TickerType

java.lang.Object
- java.lang.Enum<TickerType>
- - org.rocksdb.TickerType

所有已实现的接口:

java.io.Serializable, java.lang.Comparable<TickerType>
```
public enum TickerType
extends java.lang.Enum<TickerType>
```
The logical mapping of tickers defined in rocksdb::Tickers.
Java byte value mappings don't align 1:1 to the c++ values. c++ rocksdb::Tickers enumeration type is uint32_t and java org.rocksdb.TickerType is byte, this causes mapping issues when rocksdb::Tickers value is greater then 127 (0x7F) for jbyte jni interface as range greater is not available. Without breaking interface in minor versions, value mappings for org.rocksdb.TickerType leverage full byte range [-128 (-0x80), (0x7F)]. Newer tickers added should descend into negative values until TICKER_ENUM_MAX reaches -128 (-0x80).

枚举常量概要

枚举常量
枚举常量和说明
`BACKUP_READ_BYTES` Bytes read/written while creating backups
`BACKUP_WRITE_BYTES`
`BLOB_DB_BLOB_FILE_BYTES_READ` # of bytes read from blob file.
`BLOB_DB_BLOB_FILE_BYTES_WRITTEN` # of bytes written to blob file.
`BLOB_DB_BLOB_FILE_SYNCED` # of times a blob files being synced.
`BLOB_DB_BLOB_INDEX_EVICTED_COUNT` # of blob index evicted from base DB by BlobDB compaction filter because of corresponding file deleted.
`BLOB_DB_BLOB_INDEX_EVICTED_SIZE` Size of blob index evicted from base DB by BlobDB compaction filter because of corresponding file deleted.
`BLOB_DB_BLOB_INDEX_EXPIRED_COUNT` # of blob index evicted from base DB by BlobDB compaction filter because of expiration.
`BLOB_DB_BLOB_INDEX_EXPIRED_SIZE` Size of blob index evicted from base DB by BlobDB compaction filter because of expiration.
`BLOB_DB_BYTES_READ` # of bytes (keys + value) read from BlobDB.
`BLOB_DB_BYTES_WRITTEN` # of bytes (key + value) written to BlobDB.
`BLOB_DB_CACHE_ADD` # of data blocks added to blob cache.
`BLOB_DB_CACHE_ADD_FAILURES` # # of failures when adding blobs to blob cache.
`BLOB_DB_CACHE_BYTES_READ` # of bytes read from blob cache.
`BLOB_DB_CACHE_BYTES_WRITE` # of bytes written into blob cache.
`BLOB_DB_CACHE_HIT` # of times cache hit when accessing blob from blob cache.
`BLOB_DB_CACHE_MISS` # of times cache miss when accessing blob from blob cache.
`BLOB_DB_FIFO_BYTES_EVICTED` # of bytes in the blob files evicted because of BlobDB is full.
`BLOB_DB_FIFO_NUM_FILES_EVICTED` # of blob files evicted because of BlobDB is full.
`BLOB_DB_FIFO_NUM_KEYS_EVICTED` # of keys in the blob files evicted because of BlobDB is full.
`BLOB_DB_GC_BYTES_RELOCATED` # of bytes relocated to new blob file by garbage collection.
`BLOB_DB_GC_FAILURES` # of BlobDB garbage collection failures.
`BLOB_DB_GC_NUM_FILES` # of blob files being garbage collected.
`BLOB_DB_GC_NUM_KEYS_RELOCATED` # of keys relocated to new blob file by garbage collection.
`BLOB_DB_GC_NUM_NEW_FILES` # of blob files generated by garbage collection.
`BLOB_DB_NUM_GET` # of Get to BlobDB.
`BLOB_DB_NUM_KEYS_READ` # of keys read from BlobDB.
`BLOB_DB_NUM_KEYS_WRITTEN` # of keys written to BlobDB.
`BLOB_DB_NUM_MULTIGET` # of MultiGet to BlobDB.
`BLOB_DB_NUM_NEXT` # of Next to BlobDB iterator.
`BLOB_DB_NUM_PREV` # of Prev to BlobDB iterator.
`BLOB_DB_NUM_PUT` BlobDB specific stats # of Put/PutTTL/PutUntil to BlobDB.
`BLOB_DB_NUM_SEEK` # of Seek/SeekToFirst/SeekToLast/SeekForPrev to BlobDB iterator.
`BLOB_DB_NUM_WRITE` # of Write to BlobDB.
`BLOB_DB_WRITE_BLOB` # of keys written by BlobDB as non-TTL blob value.
`BLOB_DB_WRITE_BLOB_TTL` # of keys written by BlobDB as TTL blob value.
`BLOB_DB_WRITE_INLINED` # of keys written by BlobDB as non-TTL inlined value.
`BLOB_DB_WRITE_INLINED_TTL` # of keys written by BlobDB as TTL inlined value.
`BLOCK_CACHE_ADD`
`BLOCK_CACHE_ADD_FAILURES` # of failures when adding blocks to block cache.
`BLOCK_CACHE_BYTES_READ` # of bytes read from cache.
`BLOCK_CACHE_BYTES_WRITE` # of bytes written into cache.
`BLOCK_CACHE_DATA_ADD` # of data blocks added to block cache.
`BLOCK_CACHE_DATA_BYTES_INSERT` # of bytes of data blocks inserted into cache
`BLOCK_CACHE_DATA_HIT` # of times cache hit when accessing data block from block cache.
`BLOCK_CACHE_DATA_MISS` # of times cache miss when accessing data block from block cache.
`BLOCK_CACHE_FILTER_ADD` # of filter blocks added to block cache.
`BLOCK_CACHE_FILTER_BYTES_INSERT` # of bytes of bloom filter blocks inserted into cache
`BLOCK_CACHE_FILTER_HIT` # of times cache hit when accessing filter block from block cache.
`BLOCK_CACHE_FILTER_MISS` # of times cache miss when accessing filter block from block cache.
`BLOCK_CACHE_HIT` total block cache hit REQUIRES: BLOCK_CACHE_HIT == BLOCK_CACHE_INDEX_HIT + BLOCK_CACHE_FILTER_HIT + BLOCK_CACHE_DATA_HIT;
`BLOCK_CACHE_INDEX_ADD` # of index blocks added to block cache.
`BLOCK_CACHE_INDEX_BYTES_INSERT` # of bytes of index blocks inserted into cache
`BLOCK_CACHE_INDEX_HIT` # of times cache hit when accessing index block from block cache.
`BLOCK_CACHE_INDEX_MISS` # of times cache miss when accessing index block from block cache.
`BLOCK_CACHE_MISS` total block cache misses REQUIRES: BLOCK_CACHE_MISS == BLOCK_CACHE_INDEX_MISS + BLOCK_CACHE_FILTER_MISS + BLOCK_CACHE_DATA_MISS;
`BLOCK_CHECKSUM_COMPUTE_COUNT` Number of block checksum verifications
`BLOCK_CHECKSUM_MISMATCH_COUNT` Number of times RocksDB detected a corruption while verifying a block checksum.
`BLOOM_FILTER_FULL_POSITIVE` # of times bloom FullFilter has not avoided the reads.
`BLOOM_FILTER_FULL_TRUE_POSITIVE` # of times bloom FullFilter has not avoided the reads and data actually exist.
`BLOOM_FILTER_PREFIX_CHECKED` Number of times bloom was checked before creating iterator on a file, and the number of times the check was useful in avoiding iterator creation (and thus likely IOPs).
`BLOOM_FILTER_PREFIX_USEFUL`
`BLOOM_FILTER_USEFUL` # of times bloom filter has avoided file reads.
`BYTES_READ` The number of uncompressed bytes read from DB::Get().
`BYTES_WRITTEN` The number of uncompressed bytes issued by DB::Put(), DB::Delete(),\ DB::Merge(), and DB::Write().
`COLD_FILE_READ_BYTES`
`COLD_FILE_READ_COUNT`
`COMPACT_READ_BYTES` Bytes read during compaction.
`COMPACT_READ_BYTES_MARKED` Compaction read and write statistics broken down by CompactionReason
`COMPACT_READ_BYTES_PERIODIC`
`COMPACT_READ_BYTES_TTL`
`COMPACT_WRITE_BYTES` Bytes written during compaction.
`COMPACT_WRITE_BYTES_MARKED`
`COMPACT_WRITE_BYTES_PERIODIC`
`COMPACT_WRITE_BYTES_TTL`
`COMPACTION_CANCELLED` If a compaction was cancelled in sfm to prevent ENOSPC
`COMPACTION_KEY_DROP_NEWER_ENTRY` key was written with a newer value.
`COMPACTION_KEY_DROP_OBSOLETE` Also includes keys dropped for range del.
`COMPACTION_KEY_DROP_RANGE_DEL` key was covered by a range tombstone.
`COMPACTION_KEY_DROP_USER` User compaction function has dropped the key.
`COMPACTION_OPTIMIZED_DEL_DROP_OBSOLETE` Deletions obsoleted before bottom level due to file gap optimization.
`COMPACTION_RANGE_DEL_DROP_OBSOLETE` all keys in range were deleted.
`DB_MUTEX_WAIT_MICROS` The wait time for db mutex.
`ERROR_HANDLER_AUTORESUME_COUNT`
`ERROR_HANDLER_AUTORESUME_RETRY_TOTAL_COUNT`
`ERROR_HANDLER_AUTORESUME_SUCCESS_COUNT`
`ERROR_HANDLER_BG_ERROR_COUNT` DB error handler statistics
`ERROR_HANDLER_BG_IO_ERROR_COUNT`
`ERROR_HANDLER_BG_RETRYABLE_IO_ERROR_COUNT`
`FILES_DELETED_IMMEDIATELY` # of files deleted immediately by delete scheduler
`FILES_MARKED_TRASH` # of files marked as trash by delete scheduler
`FILTER_OPERATION_TOTAL_TIME`
`FLUSH_WRITE_BYTES` Bytes written during flush.
`GET_HIT_L0` # of Get() queries served by L0
`GET_HIT_L1` # of Get() queries served by L1
`GET_HIT_L2_AND_UP` # of Get() queries served by L2 and up
`GET_UPDATES_SINCE_CALLS` Record the number of calls to `RocksDB.getUpdatesSince(long)`.
`HOT_FILE_READ_BYTES` Tiered storage related statistics
`HOT_FILE_READ_COUNT`
`ITER_BYTES_READ` The number of uncompressed bytes read from an iterator.
`LAST_LEVEL_READ_BYTES` (non-)last level read statistics
`LAST_LEVEL_READ_COUNT`
`MEMTABLE_GARBAGE_BYTES_AT_FLUSH` Outdated bytes of data present on memtable at flush time.
`MEMTABLE_HIT` # of memtable hits.
`MEMTABLE_MISS` # of memtable misses.
`MEMTABLE_PAYLOAD_BYTES_AT_FLUSH` Bytes of raw data (payload) found on memtable at flush time.
`MERGE_OPERATION_TOTAL_TIME`
`NO_FILE_ERRORS`
`NO_FILE_OPENS`
`NO_ITERATOR_CREATED` Number of iterators created.
`NO_ITERATOR_DELETED` Number of iterators deleted.
`NON_LAST_LEVEL_READ_BYTES`
`NON_LAST_LEVEL_READ_COUNT`
`NUMBER_BLOCK_COMPRESSED` # of compressions/decompressions executed
`NUMBER_BLOCK_DECOMPRESSED`
`NUMBER_BLOCK_NOT_COMPRESSED`
`NUMBER_DB_NEXT` The number of calls to next.
`NUMBER_DB_NEXT_FOUND` The number of calls to next that returned data.
`NUMBER_DB_PREV` The number of calls to prev.
`NUMBER_DB_PREV_FOUND` The number of calls to prev that returned data.
`NUMBER_DB_SEEK` The number of calls to seek.
`NUMBER_DB_SEEK_FOUND` The number of calls to seek that returned data.
`NUMBER_DIRECT_LOAD_TABLE_PROPERTIES` Number of table's properties loaded directly from file, without creating table reader object.
`NUMBER_ITER_SKIP` Number of internal skipped during iteration
`NUMBER_KEYS_READ` Number of Keys read.
`NUMBER_KEYS_UPDATED` Number keys updated, if inplace update is enabled
`NUMBER_KEYS_WRITTEN` Number of keys written to the database via the Put and Write call's.
`NUMBER_MERGE_FAILURES`
`NUMBER_MULTIGET_BYTES_READ` Number of MultiGet bytes read.
`NUMBER_MULTIGET_CALLS` Number of MultiGet calls.
`NUMBER_MULTIGET_KEYS_FOUND` Number of MultiGet keys found (vs number requested)
`NUMBER_MULTIGET_KEYS_READ` Number of MultiGet keys read.
`NUMBER_OF_RESEEKS_IN_ITERATION` Number of times we had to reseek inside an iteration to skip over large number of keys with same userkey.
`NUMBER_RATE_LIMITER_DRAINS` Number of refill intervals where rate limiter's bytes are fully consumed.
`NUMBER_SUPERVERSION_ACQUIRES`
`NUMBER_SUPERVERSION_CLEANUPS`
`NUMBER_SUPERVERSION_RELEASES`
`PERSISTENT_CACHE_HIT` # persistent cache hit
`PERSISTENT_CACHE_MISS` # persistent cache miss
`READ_AMP_ESTIMATE_USEFUL_BYTES` Estimate of total bytes actually used.
`READ_AMP_TOTAL_READ_BYTES` Total size of loaded data blocks.
`REMOTE_COMPACT_READ_BYTES` Remote compaction read/write statistics
`REMOTE_COMPACT_WRITE_BYTES`
`ROW_CACHE_HIT` Row cache.
`ROW_CACHE_MISS`
`SECONDARY_CACHE_HITS` Number of secondary cache hits
`SIM_BLOCK_CACHE_HIT` # total simulation block cache hits
`SIM_BLOCK_CACHE_MISS` # total simulation block cache misses
`STALL_MICROS` Writer has to wait for compaction or flush to finish.
`TABLE_OPEN_PREFETCH_TAIL_HIT` Number of lookup into the prefetched tail (see `TABLE_OPEN_PREFETCH_TAIL_READ_BYTES`) that finds its data for table open
`TABLE_OPEN_PREFETCH_TAIL_MISS` Number of lookup into the prefetched tail (see `TABLE_OPEN_PREFETCH_TAIL_READ_BYTES`) that can't find its data for table open
`TICKER_ENUM_MAX`
`TXN_DUPLICATE_KEY_OVERHEAD` # of times we checked a batch for duplicate keys.
`TXN_GET_TRY_AGAIN` # of times ::Get returned TryAgain due to expired snapshot seq
`TXN_OLD_COMMIT_MAP_MUTEX_OVERHEAD` # of times old_commit_map_mutex_ is acquired in the fast path.
`TXN_PREPARE_MUTEX_OVERHEAD` These counters indicate a performance issue in WritePrepared transactions.
`TXN_SNAPSHOT_MUTEX_OVERHEAD` # of times snapshot_mutex_ is acquired in the fast path.
`VERIFY_CHECKSUM_READ_BYTES` Bytes read by `VerifyChecksum()` and `VerifyFileChecksums()` APIs.
`WAL_FILE_BYTES` Number of bytes written to WAL.
`WAL_FILE_SYNCED` Number of times WAL sync is done.
`WARM_FILE_READ_BYTES`
`WARM_FILE_READ_COUNT`
`WRITE_DONE_BY_OTHER` Equivalent to writes done for others.
`WRITE_DONE_BY_SELF` Writes can be processed by requesting thread or by the thread at the head of the writers queue.
`WRITE_WITH_WAL` Number of Write calls that request WAL.

方法概要

所有方法静态方法实例方法具体方法
限定符和类型	方法和说明
`static TickerType`	`getTickerType(byte value)` Get Ticker type by byte value.
`byte`	`getValue()` Returns the byte value of the enumerations value
`static TickerType`	`valueOf(java.lang.String name)` 返回带有指定名称的该类型的枚举常量。
`static TickerType[]`	`values()` 按照声明该枚举类型的常量的顺序, 返回包含这些常量的数组。

从类继承的方法 java.lang.Enum
clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

从类继承的方法 java.lang.Object
getClass, notify, notifyAll, wait, wait, wait

- 枚举常量详细资料
  - BLOCK_CACHE_MISS
```
public static final TickerType BLOCK_CACHE_MISS
```
    total block cache misses REQUIRES: BLOCK_CACHE_MISS == BLOCK_CACHE_INDEX_MISS + BLOCK_CACHE_FILTER_MISS + BLOCK_CACHE_DATA_MISS;
  - BLOCK_CACHE_HIT
```
public static final TickerType BLOCK_CACHE_HIT
```
    total block cache hit REQUIRES: BLOCK_CACHE_HIT == BLOCK_CACHE_INDEX_HIT + BLOCK_CACHE_FILTER_HIT + BLOCK_CACHE_DATA_HIT;
  - BLOCK_CACHE_ADD
```
public static final TickerType BLOCK_CACHE_ADD
```
  - BLOCK_CACHE_ADD_FAILURES
```
public static final TickerType BLOCK_CACHE_ADD_FAILURES
```
    # of failures when adding blocks to block cache.
  - BLOCK_CACHE_INDEX_MISS
```
public static final TickerType BLOCK_CACHE_INDEX_MISS
```
    # of times cache miss when accessing index block from block cache.
  - BLOCK_CACHE_INDEX_HIT
```
public static final TickerType BLOCK_CACHE_INDEX_HIT
```
    # of times cache hit when accessing index block from block cache.
  - BLOCK_CACHE_INDEX_ADD
```
public static final TickerType BLOCK_CACHE_INDEX_ADD
```
    # of index blocks added to block cache.
  - BLOCK_CACHE_INDEX_BYTES_INSERT
```
public static final TickerType BLOCK_CACHE_INDEX_BYTES_INSERT
```
    # of bytes of index blocks inserted into cache
  - BLOCK_CACHE_FILTER_MISS
```
public static final TickerType BLOCK_CACHE_FILTER_MISS
```
    # of times cache miss when accessing filter block from block cache.
  - BLOCK_CACHE_FILTER_HIT
```
public static final TickerType BLOCK_CACHE_FILTER_HIT
```
    # of times cache hit when accessing filter block from block cache.
  - BLOCK_CACHE_FILTER_ADD
```
public static final TickerType BLOCK_CACHE_FILTER_ADD
```
    # of filter blocks added to block cache.
  - BLOCK_CACHE_FILTER_BYTES_INSERT
```
public static final TickerType BLOCK_CACHE_FILTER_BYTES_INSERT
```
    # of bytes of bloom filter blocks inserted into cache
  - BLOCK_CACHE_DATA_MISS
```
public static final TickerType BLOCK_CACHE_DATA_MISS
```
    # of times cache miss when accessing data block from block cache.
  - BLOCK_CACHE_DATA_HIT
```
public static final TickerType BLOCK_CACHE_DATA_HIT
```
    # of times cache hit when accessing data block from block cache.
  - BLOCK_CACHE_DATA_ADD
```
public static final TickerType BLOCK_CACHE_DATA_ADD
```
    # of data blocks added to block cache.
  - BLOCK_CACHE_DATA_BYTES_INSERT
```
public static final TickerType BLOCK_CACHE_DATA_BYTES_INSERT
```
    # of bytes of data blocks inserted into cache
  - BLOCK_CACHE_BYTES_READ
```
public static final TickerType BLOCK_CACHE_BYTES_READ
```
    # of bytes read from cache.
  - BLOCK_CACHE_BYTES_WRITE
```
public static final TickerType BLOCK_CACHE_BYTES_WRITE
```
    # of bytes written into cache.
  - BLOOM_FILTER_USEFUL
```
public static final TickerType BLOOM_FILTER_USEFUL
```
    # of times bloom filter has avoided file reads.
  - PERSISTENT_CACHE_HIT
```
public static final TickerType PERSISTENT_CACHE_HIT
```
    # persistent cache hit
  - PERSISTENT_CACHE_MISS
```
public static final TickerType PERSISTENT_CACHE_MISS
```
    # persistent cache miss
  - SIM_BLOCK_CACHE_HIT
```
public static final TickerType SIM_BLOCK_CACHE_HIT
```
    # total simulation block cache hits
  - SIM_BLOCK_CACHE_MISS
```
public static final TickerType SIM_BLOCK_CACHE_MISS
```
    # total simulation block cache misses
  - MEMTABLE_HIT
```
public static final TickerType MEMTABLE_HIT
```
    # of memtable hits.
  - MEMTABLE_MISS
```
public static final TickerType MEMTABLE_MISS
```
    # of memtable misses.
  - GET_HIT_L0
```
public static final TickerType GET_HIT_L0
```
    # of Get() queries served by L0
  - GET_HIT_L1
```
public static final TickerType GET_HIT_L1
```
    # of Get() queries served by L1
  - GET_HIT_L2_AND_UP
```
public static final TickerType GET_HIT_L2_AND_UP
```
    # of Get() queries served by L2 and up
  - COMPACTION_KEY_DROP_NEWER_ENTRY
```
public static final TickerType COMPACTION_KEY_DROP_NEWER_ENTRY
```
    key was written with a newer value.
  - COMPACTION_KEY_DROP_OBSOLETE
```
public static final TickerType COMPACTION_KEY_DROP_OBSOLETE
```
    Also includes keys dropped for range del. The key is obsolete.
  - COMPACTION_KEY_DROP_RANGE_DEL
```
public static final TickerType COMPACTION_KEY_DROP_RANGE_DEL
```
    key was covered by a range tombstone.
  - COMPACTION_KEY_DROP_USER
```
public static final TickerType COMPACTION_KEY_DROP_USER
```
    User compaction function has dropped the key.
  - COMPACTION_RANGE_DEL_DROP_OBSOLETE
```
public static final TickerType COMPACTION_RANGE_DEL_DROP_OBSOLETE
```
    all keys in range were deleted.
  - NUMBER_KEYS_WRITTEN
```
public static final TickerType NUMBER_KEYS_WRITTEN
```
    Number of keys written to the database via the Put and Write call's.
  - NUMBER_KEYS_READ
```
public static final TickerType NUMBER_KEYS_READ
```
    Number of Keys read.
  - NUMBER_KEYS_UPDATED
```
public static final TickerType NUMBER_KEYS_UPDATED
```
    Number keys updated, if inplace update is enabled
  - BYTES_WRITTEN
```
public static final TickerType BYTES_WRITTEN
```
    The number of uncompressed bytes issued by DB::Put(), DB::Delete(),\ DB::Merge(), and DB::Write().
  - BYTES_READ
```
public static final TickerType BYTES_READ
```
    The number of uncompressed bytes read from DB::Get(). It could be either from memtables, cache, or table files. For the number of logical bytes read from DB::MultiGet(), please use NUMBER_MULTIGET_BYTES_READ.
  - NUMBER_DB_SEEK
```
public static final TickerType NUMBER_DB_SEEK
```
    The number of calls to seek.
  - NUMBER_DB_NEXT
```
public static final TickerType NUMBER_DB_NEXT
```
    The number of calls to next.
  - NUMBER_DB_PREV
```
public static final TickerType NUMBER_DB_PREV
```
    The number of calls to prev.
  - NUMBER_DB_SEEK_FOUND
```
public static final TickerType NUMBER_DB_SEEK_FOUND
```
    The number of calls to seek that returned data.
  - NUMBER_DB_NEXT_FOUND
```
public static final TickerType NUMBER_DB_NEXT_FOUND
```
    The number of calls to next that returned data.
  - NUMBER_DB_PREV_FOUND
```
public static final TickerType NUMBER_DB_PREV_FOUND
```
    The number of calls to prev that returned data.
  - ITER_BYTES_READ
```
public static final TickerType ITER_BYTES_READ
```
    The number of uncompressed bytes read from an iterator. Includes size of key and value.
  - NO_FILE_OPENS
```
public static final TickerType NO_FILE_OPENS
```
  - NO_FILE_ERRORS
```
public static final TickerType NO_FILE_ERRORS
```
  - STALL_MICROS
```
public static final TickerType STALL_MICROS
```
    Writer has to wait for compaction or flush to finish.
  - DB_MUTEX_WAIT_MICROS
```
public static final TickerType DB_MUTEX_WAIT_MICROS
```
    The wait time for db mutex. Disabled by default. To enable it set stats level to StatsLevel.ALL
  - NUMBER_MULTIGET_CALLS
```
public static final TickerType NUMBER_MULTIGET_CALLS
```
    Number of MultiGet calls.
  - NUMBER_MULTIGET_KEYS_READ
```
public static final TickerType NUMBER_MULTIGET_KEYS_READ
```
    Number of MultiGet keys read.
  - NUMBER_MULTIGET_BYTES_READ
```
public static final TickerType NUMBER_MULTIGET_BYTES_READ
```
    Number of MultiGet bytes read.
  - NUMBER_MERGE_FAILURES
```
public static final TickerType NUMBER_MERGE_FAILURES
```
  - BLOOM_FILTER_PREFIX_CHECKED
```
public static final TickerType BLOOM_FILTER_PREFIX_CHECKED
```
    Number of times bloom was checked before creating iterator on a file, and the number of times the check was useful in avoiding iterator creation (and thus likely IOPs).
  - BLOOM_FILTER_PREFIX_USEFUL
```
public static final TickerType BLOOM_FILTER_PREFIX_USEFUL
```
  - NUMBER_OF_RESEEKS_IN_ITERATION
```
public static final TickerType NUMBER_OF_RESEEKS_IN_ITERATION
```
    Number of times we had to reseek inside an iteration to skip over large number of keys with same userkey.
  - GET_UPDATES_SINCE_CALLS
```
public static final TickerType GET_UPDATES_SINCE_CALLS
```
    Record the number of calls to RocksDB.getUpdatesSince(long). Useful to keep track of transaction log iterator refreshes.
  - WAL_FILE_SYNCED
```
public static final TickerType WAL_FILE_SYNCED
```
    Number of times WAL sync is done.
  - WAL_FILE_BYTES
```
public static final TickerType WAL_FILE_BYTES
```
    Number of bytes written to WAL.
  - WRITE_DONE_BY_SELF
```
public static final TickerType WRITE_DONE_BY_SELF
```
    Writes can be processed by requesting thread or by the thread at the head of the writers queue.
  - WRITE_DONE_BY_OTHER
```
public static final TickerType WRITE_DONE_BY_OTHER
```
    Equivalent to writes done for others.
  - WRITE_WITH_WAL
```
public static final TickerType WRITE_WITH_WAL
```
    Number of Write calls that request WAL.
  - COMPACT_READ_BYTES
```
public static final TickerType COMPACT_READ_BYTES
```
    Bytes read during compaction.
  - COMPACT_WRITE_BYTES
```
public static final TickerType COMPACT_WRITE_BYTES
```
    Bytes written during compaction.
  - FLUSH_WRITE_BYTES
```
public static final TickerType FLUSH_WRITE_BYTES
```
    Bytes written during flush.
  - NUMBER_DIRECT_LOAD_TABLE_PROPERTIES
```
public static final TickerType NUMBER_DIRECT_LOAD_TABLE_PROPERTIES
```
    Number of table's properties loaded directly from file, without creating table reader object.
  - NUMBER_SUPERVERSION_ACQUIRES
```
public static final TickerType NUMBER_SUPERVERSION_ACQUIRES
```
  - NUMBER_SUPERVERSION_RELEASES
```
public static final TickerType NUMBER_SUPERVERSION_RELEASES
```
  - NUMBER_SUPERVERSION_CLEANUPS
```
public static final TickerType NUMBER_SUPERVERSION_CLEANUPS
```
  - NUMBER_BLOCK_COMPRESSED
```
public static final TickerType NUMBER_BLOCK_COMPRESSED
```
    # of compressions/decompressions executed
  - NUMBER_BLOCK_DECOMPRESSED
```
public static final TickerType NUMBER_BLOCK_DECOMPRESSED
```
  - NUMBER_BLOCK_NOT_COMPRESSED
```
public static final TickerType NUMBER_BLOCK_NOT_COMPRESSED
```
  - MERGE_OPERATION_TOTAL_TIME
```
public static final TickerType MERGE_OPERATION_TOTAL_TIME
```
  - FILTER_OPERATION_TOTAL_TIME
```
public static final TickerType FILTER_OPERATION_TOTAL_TIME
```
  - ROW_CACHE_HIT
```
public static final TickerType ROW_CACHE_HIT
```
    Row cache.
  - ROW_CACHE_MISS
```
public static final TickerType ROW_CACHE_MISS
```
  - READ_AMP_ESTIMATE_USEFUL_BYTES
```
public static final TickerType READ_AMP_ESTIMATE_USEFUL_BYTES
```
    Estimate of total bytes actually used.
  - READ_AMP_TOTAL_READ_BYTES
```
public static final TickerType READ_AMP_TOTAL_READ_BYTES
```
    Total size of loaded data blocks.
  - NUMBER_RATE_LIMITER_DRAINS
```
public static final TickerType NUMBER_RATE_LIMITER_DRAINS
```
    Number of refill intervals where rate limiter's bytes are fully consumed.
  - NUMBER_ITER_SKIP
```
public static final TickerType NUMBER_ITER_SKIP
```
    Number of internal skipped during iteration
  - NUMBER_MULTIGET_KEYS_FOUND
```
public static final TickerType NUMBER_MULTIGET_KEYS_FOUND
```
    Number of MultiGet keys found (vs number requested)
  - NO_ITERATOR_CREATED
```
public static final TickerType NO_ITERATOR_CREATED
```
    Number of iterators created.
  - NO_ITERATOR_DELETED
```
public static final TickerType NO_ITERATOR_DELETED
```
    Number of iterators deleted.
  - COMPACTION_OPTIMIZED_DEL_DROP_OBSOLETE
```
public static final TickerType COMPACTION_OPTIMIZED_DEL_DROP_OBSOLETE
```
    Deletions obsoleted before bottom level due to file gap optimization.
  - COMPACTION_CANCELLED
```
public static final TickerType COMPACTION_CANCELLED
```
    If a compaction was cancelled in sfm to prevent ENOSPC
  - BLOOM_FILTER_FULL_POSITIVE
```
public static final TickerType BLOOM_FILTER_FULL_POSITIVE
```
    # of times bloom FullFilter has not avoided the reads.
  - BLOOM_FILTER_FULL_TRUE_POSITIVE
```
public static final TickerType BLOOM_FILTER_FULL_TRUE_POSITIVE
```
    # of times bloom FullFilter has not avoided the reads and data actually exist.
  - BLOB_DB_NUM_PUT
```
public static final TickerType BLOB_DB_NUM_PUT
```
    BlobDB specific stats # of Put/PutTTL/PutUntil to BlobDB.
  - BLOB_DB_NUM_WRITE
```
public static final TickerType BLOB_DB_NUM_WRITE
```
    # of Write to BlobDB.
  - BLOB_DB_NUM_GET
```
public static final TickerType BLOB_DB_NUM_GET
```
    # of Get to BlobDB.
  - BLOB_DB_NUM_MULTIGET
```
public static final TickerType BLOB_DB_NUM_MULTIGET
```
    # of MultiGet to BlobDB.
  - BLOB_DB_NUM_SEEK
```
public static final TickerType BLOB_DB_NUM_SEEK
```
    # of Seek/SeekToFirst/SeekToLast/SeekForPrev to BlobDB iterator.
  - BLOB_DB_NUM_NEXT
```
public static final TickerType BLOB_DB_NUM_NEXT
```
    # of Next to BlobDB iterator.
  - BLOB_DB_NUM_PREV
```
public static final TickerType BLOB_DB_NUM_PREV
```
    # of Prev to BlobDB iterator.
  - BLOB_DB_NUM_KEYS_WRITTEN
```
public static final TickerType BLOB_DB_NUM_KEYS_WRITTEN
```
    # of keys written to BlobDB.
  - BLOB_DB_NUM_KEYS_READ
```
public static final TickerType BLOB_DB_NUM_KEYS_READ
```
    # of keys read from BlobDB.
  - BLOB_DB_BYTES_WRITTEN
```
public static final TickerType BLOB_DB_BYTES_WRITTEN
```
    # of bytes (key + value) written to BlobDB.
  - BLOB_DB_BYTES_READ
```
public static final TickerType BLOB_DB_BYTES_READ
```
    # of bytes (keys + value) read from BlobDB.
  - BLOB_DB_WRITE_INLINED
```
public static final TickerType BLOB_DB_WRITE_INLINED
```
    # of keys written by BlobDB as non-TTL inlined value.
  - BLOB_DB_WRITE_INLINED_TTL
```
public static final TickerType BLOB_DB_WRITE_INLINED_TTL
```
    # of keys written by BlobDB as TTL inlined value.
  - BLOB_DB_WRITE_BLOB
```
public static final TickerType BLOB_DB_WRITE_BLOB
```
    # of keys written by BlobDB as non-TTL blob value.
  - BLOB_DB_WRITE_BLOB_TTL
```
public static final TickerType BLOB_DB_WRITE_BLOB_TTL
```
    # of keys written by BlobDB as TTL blob value.
  - BLOB_DB_BLOB_FILE_BYTES_WRITTEN
```
public static final TickerType BLOB_DB_BLOB_FILE_BYTES_WRITTEN
```
    # of bytes written to blob file.
  - BLOB_DB_BLOB_FILE_BYTES_READ
```
public static final TickerType BLOB_DB_BLOB_FILE_BYTES_READ
```
    # of bytes read from blob file.
  - BLOB_DB_BLOB_FILE_SYNCED
```
public static final TickerType BLOB_DB_BLOB_FILE_SYNCED
```
    # of times a blob files being synced.
  - BLOB_DB_BLOB_INDEX_EXPIRED_COUNT
```
public static final TickerType BLOB_DB_BLOB_INDEX_EXPIRED_COUNT
```
    # of blob index evicted from base DB by BlobDB compaction filter because of expiration.
  - BLOB_DB_BLOB_INDEX_EXPIRED_SIZE
```
public static final TickerType BLOB_DB_BLOB_INDEX_EXPIRED_SIZE
```
    Size of blob index evicted from base DB by BlobDB compaction filter because of expiration.
  - BLOB_DB_BLOB_INDEX_EVICTED_COUNT
```
public static final TickerType BLOB_DB_BLOB_INDEX_EVICTED_COUNT
```
    # of blob index evicted from base DB by BlobDB compaction filter because of corresponding file deleted.
  - BLOB_DB_BLOB_INDEX_EVICTED_SIZE
```
public static final TickerType BLOB_DB_BLOB_INDEX_EVICTED_SIZE
```
    Size of blob index evicted from base DB by BlobDB compaction filter because of corresponding file deleted.
  - BLOB_DB_GC_NUM_FILES
```
public static final TickerType BLOB_DB_GC_NUM_FILES
```
    # of blob files being garbage collected.
  - BLOB_DB_GC_NUM_NEW_FILES
```
public static final TickerType BLOB_DB_GC_NUM_NEW_FILES
```
    # of blob files generated by garbage collection.
  - BLOB_DB_GC_FAILURES
```
public static final TickerType BLOB_DB_GC_FAILURES
```
    # of BlobDB garbage collection failures.
  - BLOB_DB_GC_NUM_KEYS_RELOCATED
```
public static final TickerType BLOB_DB_GC_NUM_KEYS_RELOCATED
```
    # of keys relocated to new blob file by garbage collection.
  - BLOB_DB_GC_BYTES_RELOCATED
```
public static final TickerType BLOB_DB_GC_BYTES_RELOCATED
```
    # of bytes relocated to new blob file by garbage collection.
  - BLOB_DB_FIFO_NUM_FILES_EVICTED
```
public static final TickerType BLOB_DB_FIFO_NUM_FILES_EVICTED
```
    # of blob files evicted because of BlobDB is full.
  - BLOB_DB_FIFO_NUM_KEYS_EVICTED
```
public static final TickerType BLOB_DB_FIFO_NUM_KEYS_EVICTED
```
    # of keys in the blob files evicted because of BlobDB is full.
  - BLOB_DB_FIFO_BYTES_EVICTED
```
public static final TickerType BLOB_DB_FIFO_BYTES_EVICTED
```
    # of bytes in the blob files evicted because of BlobDB is full.
  - TXN_PREPARE_MUTEX_OVERHEAD
```
public static final TickerType TXN_PREPARE_MUTEX_OVERHEAD
```
    These counters indicate a performance issue in WritePrepared transactions. We should not seem them ticking them much. # of times prepare_mutex_ is acquired in the fast path.
  - TXN_OLD_COMMIT_MAP_MUTEX_OVERHEAD
```
public static final TickerType TXN_OLD_COMMIT_MAP_MUTEX_OVERHEAD
```
    # of times old_commit_map_mutex_ is acquired in the fast path.
  - TXN_DUPLICATE_KEY_OVERHEAD
```
public static final TickerType TXN_DUPLICATE_KEY_OVERHEAD
```
    # of times we checked a batch for duplicate keys.
  - TXN_SNAPSHOT_MUTEX_OVERHEAD
```
public static final TickerType TXN_SNAPSHOT_MUTEX_OVERHEAD
```
    # of times snapshot_mutex_ is acquired in the fast path.
  - TXN_GET_TRY_AGAIN
```
public static final TickerType TXN_GET_TRY_AGAIN
```
    # of times ::Get returned TryAgain due to expired snapshot seq
  - FILES_MARKED_TRASH
```
public static final TickerType FILES_MARKED_TRASH
```
    # of files marked as trash by delete scheduler
  - FILES_DELETED_IMMEDIATELY
```
public static final TickerType FILES_DELETED_IMMEDIATELY
```
    # of files deleted immediately by delete scheduler
  - COMPACT_READ_BYTES_MARKED
```
public static final TickerType COMPACT_READ_BYTES_MARKED
```
    Compaction read and write statistics broken down by CompactionReason
  - COMPACT_READ_BYTES_PERIODIC
```
public static final TickerType COMPACT_READ_BYTES_PERIODIC
```
  - COMPACT_READ_BYTES_TTL
```
public static final TickerType COMPACT_READ_BYTES_TTL
```
  - COMPACT_WRITE_BYTES_MARKED
```
public static final TickerType COMPACT_WRITE_BYTES_MARKED
```
  - COMPACT_WRITE_BYTES_PERIODIC
```
public static final TickerType COMPACT_WRITE_BYTES_PERIODIC
```
  - COMPACT_WRITE_BYTES_TTL
```
public static final TickerType COMPACT_WRITE_BYTES_TTL
```
  - ERROR_HANDLER_BG_ERROR_COUNT
```
public static final TickerType ERROR_HANDLER_BG_ERROR_COUNT
```
    DB error handler statistics
  - ERROR_HANDLER_BG_IO_ERROR_COUNT
```
public static final TickerType ERROR_HANDLER_BG_IO_ERROR_COUNT
```
  - ERROR_HANDLER_BG_RETRYABLE_IO_ERROR_COUNT
```
public static final TickerType ERROR_HANDLER_BG_RETRYABLE_IO_ERROR_COUNT
```
  - ERROR_HANDLER_AUTORESUME_COUNT
```
public static final TickerType ERROR_HANDLER_AUTORESUME_COUNT
```
  - ERROR_HANDLER_AUTORESUME_RETRY_TOTAL_COUNT
```
public static final TickerType ERROR_HANDLER_AUTORESUME_RETRY_TOTAL_COUNT
```
  - ERROR_HANDLER_AUTORESUME_SUCCESS_COUNT
```
public static final TickerType ERROR_HANDLER_AUTORESUME_SUCCESS_COUNT
```
  - MEMTABLE_PAYLOAD_BYTES_AT_FLUSH
```
public static final TickerType MEMTABLE_PAYLOAD_BYTES_AT_FLUSH
```
    Bytes of raw data (payload) found on memtable at flush time. Contains the sum of garbage payload (bytes that are discarded at flush time) and useful payload (bytes of data that will eventually be written to SSTable).
  - MEMTABLE_GARBAGE_BYTES_AT_FLUSH
```
public static final TickerType MEMTABLE_GARBAGE_BYTES_AT_FLUSH
```
    Outdated bytes of data present on memtable at flush time.
  - SECONDARY_CACHE_HITS
```
public static final TickerType SECONDARY_CACHE_HITS
```
    Number of secondary cache hits
  - VERIFY_CHECKSUM_READ_BYTES
```
public static final TickerType VERIFY_CHECKSUM_READ_BYTES
```
    Bytes read by `VerifyChecksum()` and `VerifyFileChecksums()` APIs.
  - BACKUP_READ_BYTES
```
public static final TickerType BACKUP_READ_BYTES
```
    Bytes read/written while creating backups
  - BACKUP_WRITE_BYTES
```
public static final TickerType BACKUP_WRITE_BYTES
```
  - REMOTE_COMPACT_READ_BYTES
```
public static final TickerType REMOTE_COMPACT_READ_BYTES
```
    Remote compaction read/write statistics
  - REMOTE_COMPACT_WRITE_BYTES
```
public static final TickerType REMOTE_COMPACT_WRITE_BYTES
```
  - HOT_FILE_READ_BYTES
```
public static final TickerType HOT_FILE_READ_BYTES
```
    Tiered storage related statistics
  - WARM_FILE_READ_BYTES
```
public static final TickerType WARM_FILE_READ_BYTES
```
  - COLD_FILE_READ_BYTES
```
public static final TickerType COLD_FILE_READ_BYTES
```
  - HOT_FILE_READ_COUNT
```
public static final TickerType HOT_FILE_READ_COUNT
```
  - WARM_FILE_READ_COUNT
```
public static final TickerType WARM_FILE_READ_COUNT
```
  - COLD_FILE_READ_COUNT
```
public static final TickerType COLD_FILE_READ_COUNT
```
  - LAST_LEVEL_READ_BYTES
```
public static final TickerType LAST_LEVEL_READ_BYTES
```
    (non-)last level read statistics
  - LAST_LEVEL_READ_COUNT
```
public static final TickerType LAST_LEVEL_READ_COUNT
```
  - NON_LAST_LEVEL_READ_BYTES
```
public static final TickerType NON_LAST_LEVEL_READ_BYTES
```
  - NON_LAST_LEVEL_READ_COUNT
```
public static final TickerType NON_LAST_LEVEL_READ_COUNT
```
  - BLOCK_CHECKSUM_COMPUTE_COUNT
```
public static final TickerType BLOCK_CHECKSUM_COMPUTE_COUNT
```
    Number of block checksum verifications
  - BLOB_DB_CACHE_MISS
```
public static final TickerType BLOB_DB_CACHE_MISS
```
    # of times cache miss when accessing blob from blob cache.
  - BLOB_DB_CACHE_HIT
```
public static final TickerType BLOB_DB_CACHE_HIT
```
    # of times cache hit when accessing blob from blob cache.
  - BLOB_DB_CACHE_ADD
```
public static final TickerType BLOB_DB_CACHE_ADD
```
    # of data blocks added to blob cache.
  - BLOB_DB_CACHE_ADD_FAILURES
```
public static final TickerType BLOB_DB_CACHE_ADD_FAILURES
```
    # # of failures when adding blobs to blob cache.
  - BLOB_DB_CACHE_BYTES_READ
```
public static final TickerType BLOB_DB_CACHE_BYTES_READ
```
    # of bytes read from blob cache.
  - BLOB_DB_CACHE_BYTES_WRITE
```
public static final TickerType BLOB_DB_CACHE_BYTES_WRITE
```
    # of bytes written into blob cache.
  - TABLE_OPEN_PREFETCH_TAIL_MISS
```
public static final TickerType TABLE_OPEN_PREFETCH_TAIL_MISS
```
    Number of lookup into the prefetched tail (see `TABLE_OPEN_PREFETCH_TAIL_READ_BYTES`) that can't find its data for table open
  - TABLE_OPEN_PREFETCH_TAIL_HIT
```
public static final TickerType TABLE_OPEN_PREFETCH_TAIL_HIT
```
    Number of lookup into the prefetched tail (see `TABLE_OPEN_PREFETCH_TAIL_READ_BYTES`) that finds its data for table open
  - BLOCK_CHECKSUM_MISMATCH_COUNT
```
public static final TickerType BLOCK_CHECKSUM_MISMATCH_COUNT
```
    Number of times RocksDB detected a corruption while verifying a block checksum. RocksDB does not remember corruptions that happened during user reads so the same block corruption may be detected multiple times.
  - TICKER_ENUM_MAX
```
public static final TickerType TICKER_ENUM_MAX
```
- 方法详细资料
  - values
```
public static TickerType[] values()
```
    按照声明该枚举类型的常量的顺序, 返回包含这些常量的数组。该方法可用于迭代常量, 如下所示:
```
for (TickerType c : TickerType.values())
    System.out.println(c);
```
    返回:
    
    按照声明该枚举类型的常量的顺序返回的包含这些常量的数组
  - valueOf
```
public static TickerType valueOf(java.lang.String name)
```
    返回带有指定名称的该类型的枚举常量。字符串必须与用于声明该类型的枚举常量的标识符完全匹配。(不允许有多余的空格字符。)
    
    参数:
    
    name - 要返回的枚举常量的名称。
    
    返回:
    
    返回带有指定名称的枚举常量
    
    抛出:
    
    java.lang.IllegalArgumentException - 如果该枚举类型没有带有指定名称的常量
    
    java.lang.NullPointerException - 如果参数为空值
  - getValue
```
public byte getValue()
```
    Returns the byte value of the enumerations value
    
    返回:
    
    byte representation
  - getTickerType
```
public static TickerType getTickerType(byte value)
```
    Get Ticker type by byte value.
    
    参数:
    
    value - byte representation of TickerType.
    
    返回:
    
    TickerType instance.
    
    抛出:
    
    java.lang.IllegalArgumentException - if an invalid value is provided.

枚举 TickerType

枚举常量概要

方法概要

从类继承的方法 java.lang.Enum

从类继承的方法 java.lang.Object

枚举常量详细资料

BLOCK_CACHE_MISS

BLOCK_CACHE_HIT

BLOCK_CACHE_ADD

BLOCK_CACHE_ADD_FAILURES

BLOCK_CACHE_INDEX_MISS

BLOCK_CACHE_INDEX_HIT

BLOCK_CACHE_INDEX_ADD

BLOCK_CACHE_INDEX_BYTES_INSERT

BLOCK_CACHE_FILTER_MISS

BLOCK_CACHE_FILTER_HIT

BLOCK_CACHE_FILTER_ADD

BLOCK_CACHE_FILTER_BYTES_INSERT

BLOCK_CACHE_DATA_MISS

BLOCK_CACHE_DATA_HIT

BLOCK_CACHE_DATA_ADD

BLOCK_CACHE_DATA_BYTES_INSERT

BLOCK_CACHE_BYTES_READ

BLOCK_CACHE_BYTES_WRITE

BLOOM_FILTER_USEFUL

PERSISTENT_CACHE_HIT

PERSISTENT_CACHE_MISS

SIM_BLOCK_CACHE_HIT

SIM_BLOCK_CACHE_MISS

MEMTABLE_HIT

MEMTABLE_MISS

GET_HIT_L0

GET_HIT_L1

GET_HIT_L2_AND_UP

COMPACTION_KEY_DROP_NEWER_ENTRY

COMPACTION_KEY_DROP_OBSOLETE

COMPACTION_KEY_DROP_RANGE_DEL

COMPACTION_KEY_DROP_USER

COMPACTION_RANGE_DEL_DROP_OBSOLETE

NUMBER_KEYS_WRITTEN

NUMBER_KEYS_READ

NUMBER_KEYS_UPDATED

BYTES_WRITTEN

BYTES_READ

NUMBER_DB_SEEK

NUMBER_DB_NEXT

NUMBER_DB_PREV

NUMBER_DB_SEEK_FOUND

NUMBER_DB_NEXT_FOUND

NUMBER_DB_PREV_FOUND

ITER_BYTES_READ

NO_FILE_OPENS

NO_FILE_ERRORS

STALL_MICROS

DB_MUTEX_WAIT_MICROS

NUMBER_MULTIGET_CALLS

NUMBER_MULTIGET_KEYS_READ

NUMBER_MULTIGET_BYTES_READ

NUMBER_MERGE_FAILURES

BLOOM_FILTER_PREFIX_CHECKED

BLOOM_FILTER_PREFIX_USEFUL

NUMBER_OF_RESEEKS_IN_ITERATION

GET_UPDATES_SINCE_CALLS

WAL_FILE_SYNCED

WAL_FILE_BYTES

WRITE_DONE_BY_SELF

WRITE_DONE_BY_OTHER

WRITE_WITH_WAL

COMPACT_READ_BYTES

COMPACT_WRITE_BYTES

FLUSH_WRITE_BYTES

NUMBER_DIRECT_LOAD_TABLE_PROPERTIES

NUMBER_SUPERVERSION_ACQUIRES

NUMBER_SUPERVERSION_RELEASES

NUMBER_SUPERVERSION_CLEANUPS

NUMBER_BLOCK_COMPRESSED

NUMBER_BLOCK_DECOMPRESSED

NUMBER_BLOCK_NOT_COMPRESSED

MERGE_OPERATION_TOTAL_TIME

FILTER_OPERATION_TOTAL_TIME