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          Cloud database RDS

          Last Updated：2025-11-14

          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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