MyRocks Information Schema tables

When you install the MyRocks plugin for MySQL, the Information Schema is extended to include the following tables:

ROCKSDB_GLOBAL_INFO

Columns

Column Name	Type
TYPE	varchar(513)
NAME	varchar(513)
VALUE	varchar(513)

ROCKSDB_CFSTATS

Columns

Column Name	Type
CF_NAME	varchar(193)
STAT_TYPE	varchar(193)
VALUE	bigint(8)

ROCKSDB_TRX

This table stores mappings of RocksDB transaction identifiers to MySQL client identifiers to enable associating a RocksDB transaction with a MySQL client operation.

Columns

Column Name	Type
TRANSACTION_ID	bigint
STATE	varchar(193)
NAME	varchar(193)
WRITE_COUNT	bigint
LOCK_COUNT	bigint
TIMEOUT_SEC	int
WAITING_KEY	varchar(513)
WAITING_COLUMN_FAMILY_ID	int
IS_REPLICATION	int
SKIP_TRX_API	int
READ_ONLY	int
HAS_DEADLOCK_DETECTION	int
NUM_ONGOING_BULKLOAD	int
THREAD_ID	int
QUERY	varchar(193)

ROCKSDB_CF_OPTIONS

Columns

Column Name	Type
CF_NAME	varchar(193)
OPTION_TYPE	varchar(193)
VALUE	varchar(193)

ROCKSDB_ACTIVE_COMPACTION_STATS

Columns

Column Name	Type
THREAD_ID	bigint
CF_NAME	varchar(193)
INPUT_FILES	varchar(513)
OUTPUT_FILES	varchar(513)
COMPACTION_REASON	varchar(513)

ROCKSDB_COMPACTION_HISTORY

Columns

Column Name	Type
THREAD_ID	bigint
CF_NAME	varchar(513)
INPUT_LEVEL	integer
OUTPUT_LEVEL	integer
INPUT_FILES	varchar(513)
OUTPUT_FILES	varchar(513)
COMPACTION_REASON	varchar(513)
START_TIMESTAMP	bigint
END_TIMESTAMP	bigint

ROCKSDB_COMPACTION_STATS

Columns

Column Name	Type
CF_NAME	varchar(193)
LEVEL	varchar(513)
TYPE	varchar(513)
VALUE	double

ROCKSDB_DBSTATS

Columns

Column Name	Type
STAT_TYPE	varchar(193)
VALUE	bigint(8)

ROCKSDB_DDL

Columns

Column Name	Type
TABLE_SCHEMA	varchar(193)
TABLE_NAME	varchar(193)
PARTITION_NAME	varchar(193)
INDEX_NAME	varchar(193)
COLUMN_FAMILY	int(4)
INDEX_NUMBER	int(4)
INDEX_TYPE	smallint(2)
KV_FORMAT_VERSION	smallint(2)
TTL_DURATION	bigint(8)
INDEX_FLAGS	bigint(8)
CF	varchar(193)
AUTO_INCREMENT	bigint(8) unsigned

ROCKSDB_INDEX_FILE_MAP

Columns

Column Name	Type
COLUMN_FAMILY	int(4)
INDEX_NUMBER	int(4)
SST_NAME	varchar(193)
NUM_ROWS	bigint(8)
DATA_SIZE	bigint(8)
ENTRY_DELETES	bigint(8)
ENTRY_SINGLEDELETES	bigint(8)
ENTRY_MERGES	bigint(8)
ENTRY_OTHERS	bigint(8)
DISTINCT_KEYS_PREFIX	varchar(400)

ROCKSDB_LIVE_FILES_METADATA

Column Name	Type
CF_NAME	varchar(193)
LEVEL	varchar(513)
NAME	varchar(513)
DB_PATH	varchar(513)
FILE_NUMBER	bigint
FILE_TYPE	varchar(193)
SIZE	bigint
RELATIVE_FILENAME	varchar(193)
DIRECTORY	varchar(513)
TEMPERATURE	varchar(193)
FILE_CHECKSUM	varchar(513)
FILE_CHECKSUM_FUNC_NAME	varchar(193)
SMALLEST_SEQNO	bigint
LARGEST_SEQNO	bigint
SMALLEST_KEY	varchar(513)
LARGEST_KEY	varchar(513)
NUM_READS_SAMPLED	bigint
BEING_COMPACTED	tinyint
NUM_ENTRIES	bigint
NUM_DELETIONS	bigint
OLDEST_BLOB_FILE_NUMBER	bigint
OLDEST_ANCESTER_TIME	bigint
FILE_CREATION_TIME	bigint

ROCKSDB_LOCKS

This table contains the set of locks granted to MyRocks transactions.

Columns

Column Name	Type
COLUMN_FAMILY_ID	int(4)
TRANSACTION_ID	bigint
KEY	varchar(513)
MODE	varchar(32)

ROCKSDB_PERF_CONTEXT

Columns

Column Name	Type
TABLE_SCHEMA	varchar(193)
TABLE_NAME	varchar(193)
PARTITION_NAME	varchar(193)
STAT_TYPE	varchar(193)
VALUE	bigint(8)

ROCKSDB_PERF_CONTEXT_GLOBAL

Columns

Column Name	Type
STAT_TYPE	varchar(193)
VALUE	bigint(8)

ROCKSDB_DEADLOCK

This table records information about deadlocks.

Columns

Column Name	Type
DEADLOCK_ID	bigint(8)
TRANSACTION_ID	bigint(8)
CF_NAME	varchar(193)
WAITING_KEY	varchar(513)
LOCK_TYPE	varchar(193)
INDEX_NAME	varchar(193)
TABLE_NAME	varchar(193)
ROLLED_BACK	bigint(8)

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Last update: 2024-12-27