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// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
// This source code is licensed under both the GPLv2 (found in the
// COPYING file in the root directory) and Apache 2.0 License
// (found in the LICENSE.Apache file in the root directory).
package org.rocksdb;
public enum TickerType {
/**
* total block cache misses
*
* REQUIRES: BLOCK_CACHE_MISS == BLOCK_CACHE_INDEX_MISS +
* BLOCK_CACHE_FILTER_MISS +
* BLOCK_CACHE_DATA_MISS;
*/
BLOCK_CACHE_MISS((byte) 0x0),
/**
* total block cache hit
*
* REQUIRES: BLOCK_CACHE_HIT == BLOCK_CACHE_INDEX_HIT +
* BLOCK_CACHE_FILTER_HIT +
* BLOCK_CACHE_DATA_HIT;
*/
BLOCK_CACHE_HIT((byte) 0x1),
BLOCK_CACHE_ADD((byte) 0x2),
/**
* # of failures when adding blocks to block cache.
*/
BLOCK_CACHE_ADD_FAILURES((byte) 0x3),
/**
* # of times cache miss when accessing index block from block cache.
*/
BLOCK_CACHE_INDEX_MISS((byte) 0x4),
/**
* # of times cache hit when accessing index block from block cache.
*/
BLOCK_CACHE_INDEX_HIT((byte) 0x5),
/**
* # of index blocks added to block cache.
*/
BLOCK_CACHE_INDEX_ADD((byte) 0x6),
/**
* # of bytes of index blocks inserted into cache
*/
BLOCK_CACHE_INDEX_BYTES_INSERT((byte) 0x7),
/**
* # of bytes of index block erased from cache
*/
BLOCK_CACHE_INDEX_BYTES_EVICT((byte) 0x8),
/**
* # of times cache miss when accessing filter block from block cache.
*/
BLOCK_CACHE_FILTER_MISS((byte) 0x9),
/**
* # of times cache hit when accessing filter block from block cache.
*/
BLOCK_CACHE_FILTER_HIT((byte) 0xA),
/**
* # of filter blocks added to block cache.
*/
BLOCK_CACHE_FILTER_ADD((byte) 0xB),
/**
* # of bytes of bloom filter blocks inserted into cache
*/
BLOCK_CACHE_FILTER_BYTES_INSERT((byte) 0xC),
/**
* # of bytes of bloom filter block erased from cache
*/
BLOCK_CACHE_FILTER_BYTES_EVICT((byte) 0xD),
/**
* # of times cache miss when accessing data block from block cache.
*/
BLOCK_CACHE_DATA_MISS((byte) 0xE),
/**
* # of times cache hit when accessing data block from block cache.
*/
BLOCK_CACHE_DATA_HIT((byte) 0xF),
/**
* # of data blocks added to block cache.
*/
BLOCK_CACHE_DATA_ADD((byte) 0x10),
/**
* # of bytes of data blocks inserted into cache
*/
BLOCK_CACHE_DATA_BYTES_INSERT((byte) 0x11),
/**
* # of bytes read from cache.
*/
BLOCK_CACHE_BYTES_READ((byte) 0x12),
/**
* # of bytes written into cache.
*/
BLOCK_CACHE_BYTES_WRITE((byte) 0x13),
/**
* # of times bloom filter has avoided file reads.
*/
BLOOM_FILTER_USEFUL((byte) 0x14),
/**
* # persistent cache hit
*/
PERSISTENT_CACHE_HIT((byte) 0x15),
/**
* # persistent cache miss
*/
PERSISTENT_CACHE_MISS((byte) 0x16),
/**
* # total simulation block cache hits
*/
SIM_BLOCK_CACHE_HIT((byte) 0x17),
/**
* # total simulation block cache misses
*/
SIM_BLOCK_CACHE_MISS((byte) 0x18),
/**
* # of memtable hits.
*/
MEMTABLE_HIT((byte) 0x19),
/**
* # of memtable misses.
*/
MEMTABLE_MISS((byte) 0x1A),
/**
* # of Get() queries served by L0
*/
GET_HIT_L0((byte) 0x1B),
/**
* # of Get() queries served by L1
*/
GET_HIT_L1((byte) 0x1C),
/**
* # of Get() queries served by L2 and up
*/
GET_HIT_L2_AND_UP((byte) 0x1D),
/**
* COMPACTION_KEY_DROP_* count the reasons for key drop during compaction
* There are 4 reasons currently.
*/
/**
* key was written with a newer value.
*/
COMPACTION_KEY_DROP_NEWER_ENTRY((byte) 0x1E),
/**
* Also includes keys dropped for range del.
* The key is obsolete.
*/
COMPACTION_KEY_DROP_OBSOLETE((byte) 0x1F),
/**
* key was covered by a range tombstone.
*/
COMPACTION_KEY_DROP_RANGE_DEL((byte) 0x20),
/**
* User compaction function has dropped the key.
*/
COMPACTION_KEY_DROP_USER((byte) 0x21),
/**
* all keys in range were deleted.
*/
COMPACTION_RANGE_DEL_DROP_OBSOLETE((byte) 0x22),
/**
* Number of keys written to the database via the Put and Write call's.
*/
NUMBER_KEYS_WRITTEN((byte) 0x23),
/**
* Number of Keys read.
*/
NUMBER_KEYS_READ((byte) 0x24),
/**
* Number keys updated, if inplace update is enabled
*/
NUMBER_KEYS_UPDATED((byte) 0x25),
/**
* The number of uncompressed bytes issued by DB::Put(), DB::Delete(),\
* DB::Merge(), and DB::Write().
*/
BYTES_WRITTEN((byte) 0x26),
/**
* 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 {@link #NUMBER_MULTIGET_BYTES_READ}.
*/
BYTES_READ((byte) 0x27),
/**
* The number of calls to seek.
*/
NUMBER_DB_SEEK((byte) 0x28),
/**
* The number of calls to next.
*/
NUMBER_DB_NEXT((byte) 0x29),
/**
* The number of calls to prev.
*/
NUMBER_DB_PREV((byte) 0x2A),
/**
* The number of calls to seek that returned data.
*/
NUMBER_DB_SEEK_FOUND((byte) 0x2B),
/**
* The number of calls to next that returned data.
*/
NUMBER_DB_NEXT_FOUND((byte) 0x2C),
/**
* The number of calls to prev that returned data.
*/
NUMBER_DB_PREV_FOUND((byte) 0x2D),
/**
* The number of uncompressed bytes read from an iterator.
* Includes size of key and value.
*/
ITER_BYTES_READ((byte) 0x2E),
NO_FILE_CLOSES((byte) 0x2F),
NO_FILE_OPENS((byte) 0x30),
NO_FILE_ERRORS((byte) 0x31),
/**
* Time system had to wait to do LO-L1 compactions.
*
* @deprecated
*/
@Deprecated
STALL_L0_SLOWDOWN_MICROS((byte) 0x32),
/**
* Time system had to wait to move memtable to L1.
*
* @deprecated
*/
@Deprecated
STALL_MEMTABLE_COMPACTION_MICROS((byte) 0x33),
/**
* write throttle because of too many files in L0.
*
* @deprecated
*/
@Deprecated
STALL_L0_NUM_FILES_MICROS((byte) 0x34),
/**
* Writer has to wait for compaction or flush to finish.
*/
STALL_MICROS((byte) 0x35),
/**
* The wait time for db mutex.
*
* Disabled by default. To enable it set stats level to {@link StatsLevel#ALL}
*/
DB_MUTEX_WAIT_MICROS((byte) 0x36),
RATE_LIMIT_DELAY_MILLIS((byte) 0x37),
/**
* Number of iterators currently open.
*/
NO_ITERATORS((byte) 0x38),
/**
* Number of MultiGet calls.
*/
NUMBER_MULTIGET_CALLS((byte) 0x39),
/**
* Number of MultiGet keys read.
*/
NUMBER_MULTIGET_KEYS_READ((byte) 0x3A),
/**
* Number of MultiGet bytes read.
*/
NUMBER_MULTIGET_BYTES_READ((byte) 0x3B),
/**
* Number of deletes records that were not required to be
* written to storage because key does not exist.
*/
NUMBER_FILTERED_DELETES((byte) 0x3C),
NUMBER_MERGE_FAILURES((byte) 0x3D),
/**
* 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_CHECKED((byte) 0x3E),
BLOOM_FILTER_PREFIX_USEFUL((byte) 0x3F),
/**
* Number of times we had to reseek inside an iteration to skip
* over large number of keys with same userkey.
*/
NUMBER_OF_RESEEKS_IN_ITERATION((byte) 0x40),
/**
* Record the number of calls to {@link RocksDB#getUpdatesSince(long)}. Useful to keep track of
* transaction log iterator refreshes.
*/
GET_UPDATES_SINCE_CALLS((byte) 0x41),
/**
* Miss in the compressed block cache.
*/
BLOCK_CACHE_COMPRESSED_MISS((byte) 0x42),
/**
* Hit in the compressed block cache.
*/
BLOCK_CACHE_COMPRESSED_HIT((byte) 0x43),
/**
* Number of blocks added to compressed block cache.
*/
BLOCK_CACHE_COMPRESSED_ADD((byte) 0x44),
/**
* Number of failures when adding blocks to compressed block cache.
*/
BLOCK_CACHE_COMPRESSED_ADD_FAILURES((byte) 0x45),
/**
* Number of times WAL sync is done.
*/
WAL_FILE_SYNCED((byte) 0x46),
/**
* Number of bytes written to WAL.
*/
WAL_FILE_BYTES((byte) 0x47),
/**
* Writes can be processed by requesting thread or by the thread at the
* head of the writers queue.
*/
WRITE_DONE_BY_SELF((byte) 0x48),
/**
* Equivalent to writes done for others.
*/
WRITE_DONE_BY_OTHER((byte) 0x49),
/**
* Number of writes ending up with timed-out.
*/
WRITE_TIMEDOUT((byte) 0x4A),
/**
* Number of Write calls that request WAL.
*/
WRITE_WITH_WAL((byte) 0x4B),
/**
* Bytes read during compaction.
*/
COMPACT_READ_BYTES((byte) 0x4C),
/**
* Bytes written during compaction.
*/
COMPACT_WRITE_BYTES((byte) 0x4D),
/**
* Bytes written during flush.
*/
FLUSH_WRITE_BYTES((byte) 0x4E),
/**
* Number of table's properties loaded directly from file, without creating
* table reader object.
*/
NUMBER_DIRECT_LOAD_TABLE_PROPERTIES((byte) 0x4F),
NUMBER_SUPERVERSION_ACQUIRES((byte) 0x50),
NUMBER_SUPERVERSION_RELEASES((byte) 0x51),
NUMBER_SUPERVERSION_CLEANUPS((byte) 0x52),
/**
* # of compressions/decompressions executed
*/
NUMBER_BLOCK_COMPRESSED((byte) 0x53),
NUMBER_BLOCK_DECOMPRESSED((byte) 0x54),
NUMBER_BLOCK_NOT_COMPRESSED((byte) 0x55),
MERGE_OPERATION_TOTAL_TIME((byte) 0x56),
FILTER_OPERATION_TOTAL_TIME((byte) 0x57),
/**
* Row cache.
*/
ROW_CACHE_HIT((byte) 0x58),
ROW_CACHE_MISS((byte) 0x59),
/**
* Read amplification statistics.
*
* Read amplification can be calculated using this formula
* (READ_AMP_TOTAL_READ_BYTES / READ_AMP_ESTIMATE_USEFUL_BYTES)
*
* REQUIRES: ReadOptions::read_amp_bytes_per_bit to be enabled
*/
/**
* Estimate of total bytes actually used.
*/
READ_AMP_ESTIMATE_USEFUL_BYTES((byte) 0x5A),
/**
* Total size of loaded data blocks.
*/
READ_AMP_TOTAL_READ_BYTES((byte) 0x5B),
/**
* Number of refill intervals where rate limiter's bytes are fully consumed.
*/
NUMBER_RATE_LIMITER_DRAINS((byte) 0x5C),
/**
* Number of internal skipped during iteration
*/
NUMBER_ITER_SKIP((byte) 0x5D),
/**
* Number of MultiGet keys found (vs number requested)
*/
NUMBER_MULTIGET_KEYS_FOUND((byte) 0x5E),
TICKER_ENUM_MAX((byte) 0x5F);
private final byte value;
TickerType(final byte value) {
this.value = value;
}
public byte getValue() {
return value;
}
}
