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Table of contents on this page
  • MySQL-master (MysqlMaster)
  • MySQL-read only (MysqlReadOnly)
  • PostgreSQL（PG）
  • SQL Server（SqlServer）

Cloud database RDS

Updated at：2025-11-03

Cloud database RDS includes 4 types of monitor objects: MySQL-Master (MysqlMaster), MySQL-Read Only (MysqlReadOnly), PostgreSQL (PG), and SQL Server (SqlServer). The list of monitoring metrics for each type is as follows:

MySQL-master (MysqlMaster)

Metric name (English) Metric name (Chinese) Unit Dimension Remarks
BinlogCacheUsePerSecond Binary logged transactions count Time/second InstanceId
BytesReceivedPerSecond mysql bytes received Byte/second InstanceId
BytesSentPerSecond mysql bytes sent Byte/second InstanceId
ComAlterTablePerSecond Table operation count Time/second InstanceId
ConnectionUsagePercent Connection utilization % InstanceId
CPUUsagePercent CPU usage % InstanceId
CreatedTmpDiskTablesPerSecond Temporary tables on disk Item/second InstanceId
CreatedTmpFilesCountPerSecond Temporary files Item/second InstanceId
CreatedTmpTablesPerSecond Temporary tables Item/second InstanceId
DataDiskIops Access Time/second InstanceId
DataDiskRead Disk read bandwidth KB/s InstanceId
DataDiskWrite Disk write bandwidth KB/s InstanceId
DeleteCountPerSecond Deletions per second Time/second InstanceId
DiskUsagePercent Disk utilization % InstanceId
FollowerSecondsBehindLeader Master-slave delay of hot standby group Second InstanceId
HandlerCommitPerSecond Internal commits Time/second InstanceId
HandlerReadRndNextPerSecond Read next row requests Time/second InstanceId
HandlerRollbackPerSecond Internal rollbacks Time/second InstanceId
InnodbBufferPoolPagesFree InnoDB empty pages Item InstanceId
InnodbBufferPoolPagesRequestsPerSecond InnoDB logical read Time/second InstanceId
InnodbBufferPoolPagesTotal InnoDB total pages Item InstanceId
InnodbBufferPoolReadsPerSecond InnoDB physical read Time/second InstanceId
InnodbCacheHitPercent Innodb cache hit rate % InstanceId
InnodbCacheHitPercentPerSecond InnoDBbuff hit rate %/second InstanceId
InnodbCacheUsePercent Innodb cache utilization % InstanceId
InnodbDataFsyncsPerSecond Innodb fsync calls per second Time/second InstanceId
InnodbDataReadPerSecond InnoDB read throughput Byte/second InstanceId
InnodbDataReadsPerSecond InnoDB total read throughput Time/second InstanceId
InnodbDataWritesPerSecond InnoDB total write throughput Time/second InstanceId
InnodbDataWrittenPerSecond InnoDB write throughput Byte/second InstanceId
InnodbLogWaits InnoDB log buffer fresh waits Time InstanceId
InnodbLogWaitsPercent InnoDB flush wait ratio % InstanceId
InnodbLogWriteRequestsPerSecond InnoDBredolog write requests Time/second InstanceId
InnodbLogWritesPerSecond InnoDBredolog writes Time/second InstanceId
InnodbNumOpenFiles Number of tables currently opened by InnoDB Item InstanceId
InnodbRowLockTimeAvg InnoDB average row lock acquisition time Millisecond InstanceId
InnodbRowLockWaitsPerSecond InnoDB row lock waits Time/second InstanceId
InnodbRowsDeletedPerSecond InnoDB rows deleted Time/second InstanceId
InnodbRowsInsertedPerSecond InnoDB rows inserted Time/second InstanceId
InnodbRowsReadPerSecond InnoDB rows read Time/second InstanceId
InnodbRowsUpdatedPerSecond InnoDB rows updated Time/second InstanceId
InsertCountPerSecond Insertions per second Time/second InstanceId
KeyBlocksUnused Unused cache pages Item InstanceId
KeyBlocksUsed Cache usage Item InstanceId
KeyCacheBlockCount Cache blocks Item InstanceId
KeyCacheBlockUsed Used cache blocks Item InstanceId
KeyCacheHitPercent Cache hit rate % InstanceId
KeyCacheUsePercent Cache utilization % InstanceId
KeyReadRequestsPerSecond Cache read requests Item/second InstanceId
KeyReadsPerSecond Disks read Item/second InstanceId
KeyWriteRequestsPerSecond Cache writing requests Item/second InstanceId
KeyWritesPerSecond Disks written Item/second InstanceId
LeaderFollowerSyncStatus Hot standby group sync status 1: Normal synchronization; 0: Synchronization interrupted InstanceId
LogCapacity Log storage usage MB InstanceId
MasterSlaveSyncDistance Primary-backup delay distance MB InstanceId
MaxConnectionsCount Maximum connections Item InstanceId
MemUsagePercent Memory usage % InstanceId
MemUsedSize Memory used space MB InstanceId
MysqlDataSize Disk used space MB InstanceId
MysqlDiskUsedSize Disk storage usage MB InstanceId
MysqlIops Instance read/write times Time/second InstanceId
MysqlIsAlived MySQL survival Status value InstanceId
MysqlSlowQueriesPt Slow queries Time/second InstanceId
NetworkInBytes Network ingress traffic Byte/second InstanceId
NetworkOutBytes Network egress traffic Byte/second InstanceId
OpenedTablesCount Opened tables Item InstanceId
OpenFilesPerSecond Open files Time/second InstanceId
QcacheFreeBlocks qcache not used Item InstanceId
QcacheFreeMemory qcache available memory KB InstanceId
QcacheHitPercent Query cache hit rate % InstanceId
QcacheHitsPerSecond qcache hits Item/second InstanceId
QcacheInsertsPerSecond qchche inserts Item/second InstanceId
QcacheLowmemPrunesPerSecond qcache deletions Item/second InstanceId
QcacheNotCached qchche not cached Ten thousand InstanceId
QcacheQueriesInCachePerSecond qcache registrations Item/second InstanceId
QcacheTotalBlocks qchche total blocks Item InstanceId
QcacheUsePercent Query cache utilization % InstanceId
QueryCountPerSecond Operations per second Time/second InstanceId
ReadOpCountPerSecond Query requests Time/second InstanceId
ReplaceCountPerSecond Overwrites per second Time/second InstanceId
SecondsBehindMaster Master-slave delay Second InstanceId
SelectCountPerSecond Queries per second Time/second InstanceId
SelectScanCount Full table scan count Time/second InstanceId
SlaveIORunning IO thread status Status value InstanceId
SlaveSQLRunning SQL thread status Status value InstanceId
TableLocksImmediatePerSecond Immediate table locks Item/second InstanceId
TableLocksWaitedPerSecond Table lock waits Time/second InstanceId
ThreadConnectedCount Current open connections Item InstanceId
ThreadRunningCount Running threads Item InstanceId
ThreadsCacheHitsPercent Thread cache hit rate % InstanceId
ThreadsCacheHitsPercentPerSecond Thread cache hit rate per second %/second InstanceId
ThreadsCreatedCount Created threads Item InstanceId
TPS Transactions per second Time/second InstanceId
TPS_ALL Transactions per second (including implicit commits) Time/second InstanceId
TransactionCountPerSecond Commits per second Time/second InstanceId
TransactionMaxActiveSeconds Maximum transaction duration Second InstanceId
TransactionRollbackCountPerSecond Rollbacks per second Time/second InstanceId
UpdateCountPerSecond Updates per second Time/second InstanceId
VMDiskUsagePercent System disk utilization % InstanceId
WebInBytes Internet ingress traffic Byte/second InstanceId
WebOutBytes Internet egress traffic Byte/second InstanceId
WriteOpCountPerSecond Update requests Time/second InstanceId

MySQL-read only (MysqlReadOnly)

Metric name (English) Metric name (Chinese) Unit Dimension Remarks
BinlogCacheUsePerSecond Binary logged transactions count Time/second InstanceId
BytesReceivedPerSecond mysql bytes received Byte/second InstanceId
BytesSentPerSecond mysql bytes sent Byte/second InstanceId
ComAlterTablePerSecond Table operation count Time/second InstanceId
ConnectionUsagePercent Connection utilization % InstanceId
CPUUsagePercent CPU usage % InstanceId
CreatedTmpDiskTablesPerSecond Temporary tables on disk Item/second InstanceId
CreatedTmpFilesCountPerSecond Temporary files Item/second InstanceId
CreatedTmpTablesPerSecond Temporary tables Item/second InstanceId
DataDiskIops Access Time/second InstanceId
DataDiskRead Disk read bandwidth KB/s InstanceId
DataDiskWrite Disk write bandwidth KB/s InstanceId
DeleteCountPerSecond Deletions per second Time/second InstanceId
DiskUsagePercent Disk utilization % InstanceId
FollowerSecondsBehindLeader Master-slave delay of hot standby group Second InstanceId
HandlerCommitPerSecond Internal commits Time/second InstanceId
HandlerReadRndNextPerSecond Read next row requests Time/second InstanceId
HandlerRollbackPerSecond Internal rollbacks Time/second InstanceId
InnodbBufferPoolPagesFree InnoDB empty pages Item InstanceId
InnodbBufferPoolPagesRequestsPerSecond InnoDB logical read Time/second InstanceId
InnodbBufferPoolPagesTotal InnoDB total pages Item InstanceId
InnodbBufferPoolReadsPerSecond InnoDB physical read Time/second InstanceId
InnodbCacheHitPercent Innodb cache hit rate % InstanceId
InnodbCacheHitPercentPerSecond InnoDBbuff hit rate %/second InstanceId
InnodbCacheUsePercent Innodb cache utilization % InstanceId
InnodbDataFsyncsPerSecond Innodb fsync calls per second Time/second InstanceId
InnodbDataReadPerSecond InnoDB read throughput Byte/second InstanceId
InnodbDataReadsPerSecond InnoDB total read throughput Time/second InstanceId
InnodbDataWritesPerSecond InnoDB total write throughput Time/second InstanceId
InnodbDataWrittenPerSecond InnoDB write throughput Byte/second InstanceId
InnodbLogWaits InnoDB log buffer fresh waits Time InstanceId
InnodbLogWaitsPercent InnoDB flush wait ratio % InstanceId
InnodbLogWriteRequestsPerSecond InnoDBredolog write requests Time/second InstanceId
InnodbLogWritesPerSecond InnoDBredolog writes Time/second InstanceId
InnodbNumOpenFiles Number of tables currently opened by InnoDB Item InstanceId
InnodbRowLockTimeAvg InnoDB average row lock acquisition time Millisecond InstanceId
InnodbRowLockWaitsPerSecond InnoDB row lock waits Time/second InstanceId
InnodbRowsDeletedPerSecond InnoDB rows deleted Time/second InstanceId
InnodbRowsInsertedPerSecond InnoDB rows inserted Time/second InstanceId
InnodbRowsReadPerSecond InnoDB rows read Time/second InstanceId
InnodbRowsUpdatedPerSecond InnoDB rows updated Time/second InstanceId
InsertCountPerSecond Insertions per second Time/second InstanceId
KeyBlocksUnused Unused cache pages Item InstanceId
KeyBlocksUsed Cache usage Item InstanceId
KeyCacheBlockCount Cache blocks Item InstanceId
KeyCacheBlockUsed Used cache blocks Item InstanceId
KeyCacheHitPercent Cache hit rate % InstanceId
KeyCacheUsePercent Cache utilization % InstanceId
KeyReadRequestsPerSecond Cache read requests Item/second InstanceId
KeyReadsPerSecond Disks read Item/second InstanceId
KeyWriteRequestsPerSecond Cache writing requests Item/second InstanceId
KeyWritesPerSecond Disks written Item/second InstanceId
LeaderFollowerSyncStatus Hot standby group sync status 1: Normal synchronization; 0: Synchronization interrupted InstanceId
LogCapacity Log storage usage MB InstanceId
MasterSlaveSyncDistance Primary-backup delay distance MB InstanceId
MaxConnectionsCount Maximum connections Item InstanceId
MemUsagePercent Memory usage % InstanceId
MemUsedSize Memory used space MB InstanceId
MysqlDataSize Disk used space MB InstanceId
MysqlDiskUsedSize Disk storage usage MB InstanceId
MysqlIops Instance read/write times Time/second InstanceId
MysqlIsAlived MySQL survival Status value InstanceId
MysqlSlowQueriesPt Slow queries Time/second InstanceId
NetworkInBytes Network ingress traffic Byte/second InstanceId
NetworkOutBytes Network egress traffic Byte/second InstanceId
OpenedTablesCount Opened tables Item InstanceId
OpenFilesPerSecond Open files Time/second InstanceId
QcacheFreeBlocks qcache not used Item InstanceId
QcacheFreeMemory qcache available memory KB InstanceId
QcacheHitPercent Query cache hit rate % InstanceId
QcacheHitsPerSecond qcache hits Item/second InstanceId
QcacheInsertsPerSecond qchche inserts Item/second InstanceId
QcacheLowmemPrunesPerSecond qcache deletions Item/second InstanceId
QcacheNotCached qchche not cached Ten thousand InstanceId
QcacheQueriesInCachePerSecond qcache registrations Item/second InstanceId
QcacheTotalBlocks qchche total blocks Item InstanceId
QcacheUsePercent Query cache utilization % InstanceId
QueryCountPerSecond Operations per second Time/second InstanceId
ReadOpCountPerSecond Query requests Time/second InstanceId
ReplaceCountPerSecond Overwrites per second Time/second InstanceId
SecondsBehindMaster Master-slave delay Second InstanceId
SelectCountPerSecond Queries per second Time/second InstanceId
SelectScanCount Full table scan count Time/second InstanceId
SlaveIORunning IO thread status Status value InstanceId
SlaveSQLRunning SQL thread status Status value InstanceId
TableLocksImmediatePerSecond Immediate table locks Item/second InstanceId
TableLocksWaitedPerSecond Table lock waits Time/second InstanceId
ThreadConnectedCount Current open connections Item InstanceId
ThreadRunningCount Running threads Item InstanceId
ThreadsCacheHitsPercent Thread cache hit rate % InstanceId
ThreadsCacheHitsPercentPerSecond Thread cache hit rate per second %/second InstanceId
ThreadsCreatedCount Created threads Item InstanceId
TPS Transactions per second Time/second InstanceId
TPS_ALL Transactions per second (including implicit commits) Time/second InstanceId
TransactionCountPerSecond Commits per second Time/second InstanceId
TransactionMaxActiveSeconds Maximum transaction duration Second InstanceId
TransactionRollbackCountPerSecond Rollbacks per second Time/second InstanceId
UpdateCountPerSecond Updates per second Time/second InstanceId
VMDiskUsagePercent System disk utilization % InstanceId
WebInBytes Internet ingress traffic Byte/second InstanceId
WebOutBytes Internet egress traffic Byte/second InstanceId
WriteOpCountPerSecond Update requests Time/second InstanceId

PostgreSQL（PG）

Metric name (English) Metric name (Chinese) Unit Dimension Remarks
AvgSqlRuntimeMs Average execution latency ms InstanceId
BlksHitPercent Buffer cache hit rate % InstanceId
CPUUsagePercent CPU occupation ratio % InstanceId
DiskUsagePercent Disk utilization % InstanceId
MaxSqlRuntimeMs Maximum TOP10 execution latency ms InstanceId
MemUsagePercent Memory usage % InstanceId
MinSqlRuntimeMs Minimum TOP10 execution latency ms InstanceId
NetworkInBytes Network ingress traffic B InstanceId
NetworkOutBytes Network egress traffic B InstanceId
OtherCalls Other requests Time/second InstanceId
QueryCountPerSecond Operations per second Time/second InstanceId
ReadOpCountPerSecond Query requests Time/second InstanceId
ReadWriteCalls Read/write requests Time/second InstanceId
RemainingXid Remaining XID count Item InstanceId
ReplicationDelayTime Replica WAL replay lag Second InstanceId
SlaveXlogDiff Replica LSN lag: received vs applied Byte InstanceId
SlowQueries Slow queries Row/second InstanceId
ThreadConnectedCount Current open connections Item InstanceId
ThreadRunningCount Running threads Item InstanceId
TransactionMaxActiveSeconds Maximum transaction duration Second InstanceId
WebInBytes Internet ingress traffic B InstanceId
WebOutBytes Internet egress traffic B InstanceId
WriteOpCountPerSecond Update requests Time/second InstanceId
XlogDiff Primary-replica log discrepancy Byte InstanceId

SQL Server（SqlServer）

Metric name (English) Metric name (Chinese) Unit Dimension Remarks
CPUUsagePercent CPU occupation ratio % InstanceId
DiskUsagePercent Disk utilization % InstanceId
MemUsagePercent Memory usage % InstanceId
NetworkInBytes Network ingress traffic B InstanceId
NetworkOutBytes Network egress traffic B InstanceId
QueryCountPerSecond Operations per second Time/second InstanceId
ReadOpCountPerSecond Query requests Time/second InstanceId
ThreadConnectedCount Current open connections Item InstanceId
ThreadRunningCount Running threads Item InstanceId
TransactionMaxActiveSeconds Maximum transaction duration Second InstanceId
WebInBytes Internet ingress traffic B InstanceId
WebOutBytes Internet egress traffic B InstanceId
WriteOpCountPerSecond Update requests Time/second InstanceId

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