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Yandex Monitoring metric reference

Written by
Improved by
Updated at April 9, 2025

This section describes Managed Service for MySQL® metrics delivered to Monitoring.

The name label stores the metric name.

Labels shared by all Managed Service for MySQL® metrics:

Label Value
service Service ID: managed-mysql
resource_type Resource type: cluster
resource_id Cluster ID
host Host FQDN
node Host type: primary, replica

CPU metrics

These metrics show processor core workload.

Name
Type, units		 Description
cpu.guest
DGAUGE, %		 CPU core usage, guest usage type
cpu.guest_nice
DGAUGE, %		 CPU core usage, guest_nice usage type
cpu.idle
DGAUGE, %		 CPU core usage, idle usage type
cpu.iowait
DGAUGE, %		 CPU core usage, iowait usage type
cpu.irq
DGAUGE, %		 CPU core usage, irq usage type
cpu.nice
DGAUGE, %		 CPU core usage, nice usage type
cpu.softirq
DGAUGE, %		 CPU core usage, softirq usage type
cpu.steal
DGAUGE, %		 CPU core usage, steal usage type
cpu.system
DGAUGE, %		 CPU core usage, system usage type
cpu.usage_idle
DGAUGE, %		 CPU core usage, idle usage type
cpu.user
DGAUGE, %		 CPU core usage, user usage type
load.avg_15min
DGAUGE, %		 Average load over 15 minutes
load.avg_1min
DGAUGE, %		 Average load over one minute
load.avg_5min
DGAUGE, %		 Average load over five minutes

Disk metrics

Name
Type, units		 Description
disk.free
DGAUGE, bytes		 Free space
disk.free_bytes
DGAUGE, bytes		 Free space
disk.free_inodes
DGAUGE, number		 Free inodes
disk.inodes_free
DGAUGE, number		 Free inodes
disk.inodes_total
DGAUGE, number		 Available inodes
disk.inodes_used
DGAUGE, number		 Used inodes
disk.inodes_used_percent
DGAUGE, %		 Percentage of used inodes
disk.total
DGAUGE, bytes		 Available space
disk.total_bytes
DGAUGE, bytes		 Available space
disk.total_inodes
DGAUGE, number		 Available inodes
disk.used
DGAUGE, bytes		 Used space
disk.used_bytes
DGAUGE, bytes		 Used space
disk.used_inodes
DGAUGE, number		 Used inodes
disk.used_percent
DGAUGE, %		 Percentage of used space
disk.used_percent_inodes
DGAUGE, %		 Percentage of used inodes

Disk I/O metrics

Name
Type, units		 Description
io.avg_read_time
DGAUGE, milliseconds		 Average disk read time
io.avg_write_time
DGAUGE, milliseconds		 Average disk write time
io.disk*.avg_read_time
DGAUGE, milliseconds		 Average read time for a given disk
io.disk*.avg_write_time
DGAUGE, milliseconds		 Average write time for a given disk
io.disk*.read_bytes
DGAUGE, bytes per second		 Read speed for a given disk
io.disk*.read_count
DGAUGE, operations per second		 Number of reads per second for a given disk
io.disk*.read_merged_count
DGAUGE, operations per second		 Number of merged read operations per second for a given disk
io.disk*.utilization
DGAUGE, %		 Utilization of a given disk; disabled for network drives.
io.disk*.write_bytes
DGAUGE, bytes per second		 Write speed for a given disk
io.disk*.write_count
DGAUGE, operations per second		 Number of writes per second for a given disk
io.disk*.write_merged_count
DGAUGE, operations per second		 Number of merged write operations per second for a given disk
io.read_bytes
DGAUGE, bytes per second		 Disk read speed
io.read_count
DGAUGE, operations per second		 Number of read operations per second
io.read_merged_count
DGAUGE, operations per second		 Number of merged read operations per second
io.utilization
DGAUGE, %		 Disk utilization
io.write_bytes
DGAUGE, bytes per second		 Disk write speed
io.write_count
DGAUGE, operations per second		 Number of writes per second
io.write_merged_count
DGAUGE, operations per second		 Number of merged write operations per second

RAM metrics

Name
Type, units		 Description
mem.active_bytes
DGAUGE, bytes		 Active resident memory
mem.available_bytes
DGAUGE, bytes		 RAM usage, available usage type
mem.available_percent_bytes
DGAUGE, %		 Percentage of RAM usage, available usage type
mem.buffers_bytes
DGAUGE, bytes		 RAM usage, buffers usage type
mem.cached_bytes
DGAUGE, bytes		 RAM usage, cached usage type
mem.commit_limit_bytes
DGAUGE, bytes		 RAM usage, commit_limit usage type
mem.committed_as_bytes
DGAUGE, bytes		 RAM usage, committed_as usage type
mem.dirty_bytes
DGAUGE, bytes		 RAM usage, dirty usage type
mem.free_bytes
DGAUGE, bytes		 Amount of free RAM available, excluding mem.buffers_bytes and mem.cached_bytes
mem.high_free_bytes
DGAUGE, bytes		 RAM usage, high_free usage type
mem.high_total_bytes
DGAUGE, bytes		 RAM usage, high_total usage type
mem.huge_pages_free_bytes
DGAUGE, bytes		 RAM usage, huge_pages_free usage type
mem.huge_page_size_bytes
DGAUGE, bytes		 RAM usage, huge_page_size usage type
mem.huge_pages_total_bytes
DGAUGE, bytes		 RAM usage, huge_pages_total usage type
mem.inactive_bytes
DGAUGE, bytes		 RAM usage, inactive usage type
mem.low_free_bytes
DGAUGE, bytes		 RAM usage, low_free usage type
mem.low_total_bytes
DGAUGE, bytes		 RAM usage, low_total usage type
mem.mapped_bytes
DGAUGE, bytes		 RAM usage, mapped usage type
mem.page_tables_bytes
DGAUGE, bytes		 RAM usage, page_tables usage type
mem.shared_bytes
DGAUGE, bytes		 RAM usage, shared usage type
mem.slab_bytes
DGAUGE, bytes		 RAM usage, slab usage type
mem.sreclaimable_bytes
DGAUGE, bytes		 RAM usage, sreclaimable usage type
mem.sunreclaim_bytes
DGAUGE, bytes		 RAM usage, sunreclaim usage type
mem.swap_cached_bytes
DGAUGE, bytes		 RAM usage, swap_cached usage type
mem.swap_free_bytes
DGAUGE, bytes		 RAM usage, swap_free usage type
mem.swap_total_bytes
DGAUGE, bytes		 RAM usage, swap_total usage type
mem.total
DGAUGE, bytes		 RAM usage, total usage type
mem.total_bytes
DGAUGE, bytes		 RAM usage, total usage type
mem.used
DGAUGE, bytes		 RAM usage, used usage type
mem.used_bytes
DGAUGE, bytes		 Amount of RAM currently used by running processes
mem.used_percent
DGAUGE, %		 Percentage of used RAM
mem.vmalloc_chunk_bytes
DGAUGE, bytes		 RAM usage, vmalloc_chunk usage type
mem.vmalloc_total_bytes
DGAUGE, bytes		 RAM usage, vmalloc_total usage type
mem.vmalloc_used_bytes
DGAUGE, bytes		 RAM usage, vmalloc_used usage type
mem.write_back_bytes
DGAUGE, bytes		 RAM usage, write_back usage type
mem.write_back_tmp_bytes
DGAUGE, bytes		 RAM usage, write_back_tmp usage type

Network metrics

Name
Type, units		 Description
net.bytes_recv
DGAUGE, bytes per second		 Network data receive rate
net.bytes_sent
DGAUGE, bytes per second		 Network data transmit rate
net.dropin
DGAUGE, number		 Dropped receive packets
net.dropout
DGAUGE, number		 Dropped transmit packets
net.errin
DGAUGE, number		 Receive error count
net.errout
DGAUGE, number		 Transmit error count
net.icmpmsg_intype8
DGAUGE, messages		 Number of ICMP type 8 (echo request) messages received
net.icmpmsg_outtype0
DGAUGE, messages		 Number of ICMP type 0 (echo reply) messages sent
net.icmp_outratelimitglobal
DGAUGE, messages		 Number of ICMP messages throttled by global rate limits
net.icmp_outratelimithost
DGAUGE, messages		 Number of ICMP messages throttled by host-specific rate limits
net.ip_outtransmits
DGAUGE, packages		 Number of successfully sent IP packets
net.packets_recv
DGAUGE, packets per second		 Network packet receive rate
net.packets_sent
DGAUGE, packets per second		 Network packet transmit rate
net.speed
DGAUGE, bits per second		 Maximum network data transfer rate for this interface
net.udplite_memerrors
DGAUGE, errors		 Number of UDP-Lite out-of-memory errors
net.udp_memerrors
DGAUGE, errors		 Number of UDP out-of-memory errors

Service metrics

Name
Type, units		 Description
dbaas_conf.cpu_fraction
DGAUGE, fractions		 Fraction of available CPU resources allocated by the service
dbaas_conf.cpu_guarantee
DGAUGE, fractions		 Guaranteed fraction of CPU resources allocated by the service
dbaas_conf.cpu_limit
DGAUGE, fractions		 Maximum allowed fraction of CPU resource usage
dbaas_conf.hosts_ha
DGAUGE, hosts		 Number of hosts set up for high availability
dbaas_conf.hosts.total
DGAUGE, hosts		 Total hosts used by the service
disk.mysql.binlogs_bytes
DGAUGE, bytes		 Space used by MySQL service logs
disk.mysql.data_bytes
DGAUGE, bytes		 Space used by data
disk.mysql.default_tablespace_bytes
DGAUGE, bytes		 Space used by data in the default tablespace
disk.mysql.innodb_logs_bytes
DGAUGE, bytes		 Space used by InnoDB logs
disk.mysql.relaylogs_bytes
DGAUGE, bytes		 Space used by MySQL service logs
disk.mysql.temp_tablespace_bytes
DGAUGE, bytes		 Space used by data in the temporary tablespace
disk.mysql.undo_tablespace_bytes
DGAUGE, bytes		 Space used by data in the InnoDB undo tablespace
mysql.fileio.read_bytes
DGAUGE, bytes per second		 Data read speed.
Additional labels: filetype.
mysql.fileio.reads
DGAUGE, operations per second		 Average speed of file reads per second.
Additional labels: filetype.
mysql.fileio.write_bytes
DGAUGE, bytes per second		 Data write speed.
Additional labels: filetype.
mysql.fileio.writes
DGAUGE, operations per second		 Average speed of file writes per second.
Additional labels: filetype.
mysql.handler
DGAUGE, number		 Number of handlers of various operations. For more information, see this MySQL article.
Additional labels: handler.
mysql.session
DGAUGE, number		 Number of sessions at a certain stage.
Additional labels: stage.
mysql_Aborted_connects_rate
DGAUGE, connections per second		 Rate of failed database connection attempts
mysql_Binlog_cache_disk_use_rate
DGAUGE, transactions per second		 Rate of transactions requiring temporary disk file writes due to binlog cache overflowing
mysql_Binlog_cache_use_rate
DGAUGE, transactions per second		 Rate of transactions using the binlog cache
mysql_Connections_rate
DGAUGE, connections per second		 Rate of database connection attempts (both successful and failed)
mysql_Created_tmp_disk_tables_rate
DGAUGE, tables per second		 Rate of temporary tables created on the disk during DB query processing
mysql_Created_tmp_files_rate
DGAUGE, files per second		 Rate of temporary DB file creation
mysql_Created_tmp_tables_rate
DGAUGE, tables per second		 Rate of temporary tables created during DB query processing
mysql_Innodb_buffer_pool_pages_data
DGAUGE, number		 Number of pages with data in the InnoDB buffer. It includes dirty and clean.
mysql_Innodb_buffer_pool_pages_dirty
DGAUGE, number		 Number of dirty pages in the InnoDB buffer
mysql_Innodb_buffer_pool_pages_free
DGAUGE, number		 Number of free pages in the InnoDB buffer
mysql_Innodb_buffer_pool_pages_misc
DGAUGE, number		 Number of service pages in the InnoDB buffer
mysql_Innodb_buffer_pool_pages_total
DGAUGE, number		 Total pages in the InnoDB buffer
mysql_Innodb_buffer_pool_read_requests_rate
DGAUGE, operations per second		 Rate of InnoDB reads
mysql_Innodb_buffer_pool_reads_rate
DGAUGE, operations per second		 Rate of InnoDB reads requiring InnoDB to access the disk
mysql_Innodb_checkpoint_age
DGAUGE, bytes		 Size of InnoDB in-memory data before disk flush
mysql_Innodb_checkpoint_max_age
DGAUGE, bytes		 Maximum size of InnoDB in-memory data before disk flush
mysql_Innodb_data_fsyncs_rate
DGAUGE, operations per second		 Rate of fsync() operations when flushing data to the disk in InnoDB
mysql_Innodb_data_reads_rate
DGAUGE, operations per second		 Disk read rate in InnoDB
mysql_Innodb_data_writes_rate
DGAUGE, operations per second		 Write rate in InnoDB
mysql_Innodb_page_size
DGAUGE, bytes		 Page size in InnoDB (defaults to 16 KB)
mysql_Innodb_row_lock_current_waits
DGAUGE, number		 Number of row locks in InnoDB
mysql_Innodb_row_lock_time_rate
DGAUGE, milliseconds		 Total InnoDB row lock wait time
mysql_Innodb_row_lock_waits_rate
DGAUGE, operations per second		 Rate of InnoDB operations waiting for row locks
mysql_Innodb_rows_deleted_rate
DGAUGE, rows per second		 Rate of rows deleted from InnoDB
mysql_Innodb_rows_inserted_rate
DGAUGE, rows per second		 Rate of rows inserted in InnoDB
mysql_Innodb_rows_read_rate
DGAUGE, rows per second		 Rate of rows read from InnoDB tables
mysql_Innodb_rows_updated_rate
DGAUGE, rows per second		 Rate of rows updated in InnoDB
mysql_Open_table_definitions
DGAUGE, number		 Number of cached table definitions
mysql_Open_tables
DGAUGE, number		 Number of open tables
mysql_Opened_table_definitions_rate
DGAUGE, tables per second		 Number of table definitions cached per unit of time
mysql_Opened_tables_rate
DGAUGE, tables per second		 Number of tables opened per unit of time
mysql_Prepared_stmt_count
DGAUGE, number		 Number of prepared statements
mysql_Queries_rate
DGAUGE, queries per second		 Number of running queries, including user queries and stored procedures, per unit of time
mysql_Questions_rate
DGAUGE, requests per second		 Number of running user queries per unit of time
mysql_Rpl_semi_sync_master_clients
DGAUGE, number		 Number of semi-sync replicas
mysql_Rpl_semi_sync_master_tx_avg_wait_time
DGAUGE, microseconds		 Average wait time for a transaction on the replication source
mysql_Rpl_semi_sync_master_tx_wait_time_rate
DGAUGE, microseconds		 Total wait time for a transaction on the replication source, per unit of time
mysql_Rpl_semi_sync_master_wait_sessions
DGAUGE, number		 Number of sessions waiting for a response from replicas
mysql_Select_full_join_rate
DGAUGE, requests per second		 Number of Joins that use table scans instead of indexes
mysql_Select_full_range_join_rate
DGAUGE, requests per second		 Number of Joins that search by range in a reference table
mysql_Slow_queries_rate
DGAUGE, requests per second		 Number of slow queries taking longer than long_query_time seconds, per unit of time
mysql_Sort_range_rate
DGAUGE, requests per second		 Number of sorts by range per unit of time
mysql_Sort_rows_rate
DGAUGE, requests per second		 Number of rows sorted per unit of time
mysql_Sort_scan_rate
DGAUGE, requests per second		 Number of sorts using table scans per unit of time
mysql_Table_locks_immediate
DGAUGE, number		 Number of immediate table locks
mysql_Table_locks_waited
DGAUGE, number		 Number of table locks that had to wait
mysql_Table_open_cache_hits_rate
DGAUGE, operations per second		 Number of hits for a search in the cache of open tables per unit of time
mysql_Table_open_cache_misses_rate
DGAUGE, operations per second		 Number of failed attempts to search in the cache of open tables per unit of time
mysql_Threads_cached
DGAUGE, number		 Number of threads cached
mysql_Threads_connected
DGAUGE, number		 Number of threads handling open DB connections
mysql_Threads_created_rate
DGAUGE, threads per second		 Number of threads created per unit of time
mysql_Threads_running
DGAUGE, number		 Number of threads running at the moment
mysql_Uptime
DGAUGE, seconds		 Server uptime since last restart
mysql_config_innodb_buffer_pool_size
DGAUGE, bytes		 Size of the InnoDB buffer pool
mysql_config_innodb_log_file_size
DGAUGE, bytes		 Log file size in the log group
mysql_config_max_connections
DGAUGE, number		 Maximum number of concurrent connections
mysql_config_table_open_cache
DGAUGE, number		 Number of open tables cache for all threads
mysql_config_thread_cache_size
DGAUGE, number		 Number of threads that need to be cached to be reused
mysql_is_alive
DGAUGE, 0/1		 Host health indicator.
It can be either 1 if a DB host is alive or 0 if it is not.
mysql_is_primary
DGAUGE, 0/1		 Master host indicator.
It can be either 1 if a DB host is a master or 0 if it is not.
mysql_is_replica
DGAUGE, 0/1		 Replica host indicator.
It can be either 1 if a DB host is a replica or 0 if it is not.
mysql_latency_query_0.5
DGAUGE, milliseconds		 Query execution time, median value
mysql_latency_query_0.75
DGAUGE, milliseconds		 Query execution time, 0.75 percentile
mysql_latency_query_0.90
DGAUGE, milliseconds		 Query execution time, 0.90 percentile
mysql_latency_query_0.95
DGAUGE, milliseconds		 Query execution time, 0.95 percentile
mysql_latency_query_0.99
DGAUGE, milliseconds		 Query execution time, 0.99 percentile
mysql_latency_query_avg
DGAUGE, milliseconds		 Average query execution time
mysql_latency_query_oldest
DGAUGE, milliseconds		 Execution time of the oldest query
mysql_latency_trx_0.5
DGAUGE, milliseconds		 Transaction execution time, median value
mysql_latency_trx_0.75
DGAUGE, milliseconds		 Transaction execution time, 0.75 percentile
mysql_latency_trx_0.90
DGAUGE, milliseconds		 Transaction execution time, 0.90 percentile
mysql_latency_trx_0.95
DGAUGE, milliseconds		 Transaction execution time, 0.95 percentile
mysql_latency_trx_0.99
DGAUGE, milliseconds		 Transaction execution time, 0.99 percentile
mysql_latency_trx_avg
DGAUGE, milliseconds		 Average transaction execution time
mysql_latency_trx_oldest
DGAUGE, milliseconds		 Execution time of the oldest transaction
mysql_replication_lag
DGAUGE, seconds		 Time that a replica lags behind the master
mysql_replication_io_thread_running
DGAUGE, 0/1		 State of MySQL® replication I/O thread.
It can be either 1 if the thread is running or 0 if it is stopped.
mysql_replication_sql_thread_running
DGAUGE, 0/1		 State of MySQL® replication SQL thread.
It can be either 1 if the thread is running or 0 if it is stopped.
mysql_role
DGAUGE, 1/2		 Current MySQL server role in the replication.
It can be either 2 if the server is a replica (secondary server) or 1 if it is a master (primary server).
mysql_writable
DGAUGE, 0/1		 Server write access.
It can be either 1 if a server is available for writes or 0 if it is not.

Other metrics

Name
Type, units		 Description
can_read
DGAUGE, 0/1		 Read access indicator.
It can be either 1 if a cluster is available for reads or 0 if it is not.
can_write
DGAUGE, 0/1		 Write access indicator.
It can be either 1 if a cluster is available for writes or 0 if it is not.
core_dump_count
DGAUGE, number		 Number of core dumps
n_unique_users
DGAUGE, users		 Number of unique users or accounts engaging with the system
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