# [[metric:io_read_time]]

> 来自 pg_stat_io 或操作系统遥测的读取延迟。
---

来自 pg_stat_io 或操作系统遥测的读取延迟。

## 被哪些等待事件引用 {#wait-events}

- [IO/AioIoCompletion](/zh/io/aio-io-completion/)
- [IO/AioIoUringExecution](/zh/io/aio-io-uring-execution/)
- [IO/AioIoUringSubmit](/zh/io/aio-io-uring-submit/)
- [IO/BasebackupRead](/zh/io/basebackup-read/)
- [IO/BasebackupSync](/zh/io/basebackup-sync/)
- [IO/BasebackupWrite](/zh/io/basebackup-write/)
- [IO/BuffileRead](/zh/io/buffile-read/)
- [IO/BuffileTruncate](/zh/io/buffile-truncate/)
- [IO/BuffileWrite](/zh/io/buffile-write/)
- [IO/ControlFileRead](/zh/io/control-file-read/)
- [IO/ControlFileSync](/zh/io/control-file-sync/)
- [IO/ControlFileSyncUpdate](/zh/io/control-file-sync-update/)
- [IO/ControlFileWrite](/zh/io/control-file-write/)
- [IO/ControlFileWriteUpdate](/zh/io/control-file-write-update/)
- [IO/CopyFileCopy](/zh/io/copy-file-copy/)
- [IO/CopyFileRead](/zh/io/copy-file-read/)
- [IO/CopyFileWrite](/zh/io/copy-file-write/)
- [IO/DataFileExtend](/zh/io/data-file-extend/)
- [IO/DataFileFlush](/zh/io/data-file-flush/)
- [IO/DataFileImmediateSync](/zh/io/data-file-immediate-sync/)
- [IO/DataFilePrefetch](/zh/io/data-file-prefetch/)
- [IO/DataFileRead](/zh/io/data-file-read/)
- [IO/DataFileSync](/zh/io/data-file-sync/)
- [IO/DataFileTruncate](/zh/io/data-file-truncate/)
- [IO/DataFileWrite](/zh/io/data-file-write/)
- [IO/DsmAllocate](/zh/io/dsm-allocate/)
- [IO/DsmFillZeroWrite](/zh/io/dsm-fill-zero-write/)
- [IO/LockFileAddtodatadirRead](/zh/io/lock-file-addtodatadir-read/)
- [IO/LockFileAddtodatadirSync](/zh/io/lock-file-addtodatadir-sync/)
- [IO/LockFileAddtodatadirWrite](/zh/io/lock-file-addtodatadir-write/)
- [IO/LockFileCreateRead](/zh/io/lock-file-create-read/)
- [IO/LockFileCreateSync](/zh/io/lock-file-create-sync/)
- [IO/LockFileCreateWrite](/zh/io/lock-file-create-write/)
- [IO/LockFileRecheckdatadirRead](/zh/io/lock-file-recheckdatadir-read/)
- [IO/LogicalChangesRead](/zh/io/logical-changes-read/)
- [IO/LogicalChangesWrite](/zh/io/logical-changes-write/)
- [IO/LogicalRewriteCheckpointSync](/zh/io/logical-rewrite-checkpoint-sync/)
- [IO/LogicalRewriteMappingSync](/zh/io/logical-rewrite-mapping-sync/)
- [IO/LogicalRewriteMappingWrite](/zh/io/logical-rewrite-mapping-write/)
- [IO/LogicalRewriteSync](/zh/io/logical-rewrite-sync/)
- [IO/LogicalRewriteTruncate](/zh/io/logical-rewrite-truncate/)
- [IO/LogicalRewriteWrite](/zh/io/logical-rewrite-write/)
- [IO/LogicalSubxactRead](/zh/io/logical-subxact-read/)
- [IO/LogicalSubxactWrite](/zh/io/logical-subxact-write/)
- [IO/RelationMapRead](/zh/io/relation-map-read/)
- [IO/RelationMapReplace](/zh/io/relation-map-replace/)
- [IO/RelationMapSync](/zh/io/relation-map-sync/)
- [IO/RelationMapWrite](/zh/io/relation-map-write/)
- [IO/ReorderBufferRead](/zh/io/reorder-buffer-read/)
- [IO/ReorderBufferWrite](/zh/io/reorder-buffer-write/)
- [IO/ReorderLogicalMappingRead](/zh/io/reorder-logical-mapping-read/)
- [IO/ReplicationSlotRead](/zh/io/replication-slot-read/)
- [IO/ReplicationSlotRestoreSync](/zh/io/replication-slot-restore-sync/)
- [IO/ReplicationSlotSync](/zh/io/replication-slot-sync/)
- [IO/ReplicationSlotWrite](/zh/io/replication-slot-write/)
- [IO/SlruFlushSync](/zh/io/slru-flush-sync/)
- [IO/SlruRead](/zh/io/slru-read/)
- [IO/SlruSync](/zh/io/slru-sync/)
- [IO/SlruWrite](/zh/io/slru-write/)
- [IO/SnapbuildRead](/zh/io/snapbuild-read/)
- [IO/SnapbuildSync](/zh/io/snapbuild-sync/)
- [IO/SnapbuildWrite](/zh/io/snapbuild-write/)
- [IO/TimelineHistoryFileSync](/zh/io/timeline-history-file-sync/)
- [IO/TimelineHistoryFileWrite](/zh/io/timeline-history-file-write/)
- [IO/TimelineHistoryRead](/zh/io/timeline-history-read/)
- [IO/TimelineHistorySync](/zh/io/timeline-history-sync/)
- [IO/TimelineHistoryWrite](/zh/io/timeline-history-write/)
- [IO/TwophaseFileRead](/zh/io/twophase-file-read/)
- [IO/TwophaseFileSync](/zh/io/twophase-file-sync/)
- [IO/TwophaseFileWrite](/zh/io/twophase-file-write/)
- [IO/VersionFileSync](/zh/io/version-file-sync/)
- [IO/VersionFileWrite](/zh/io/version-file-write/)
- [IO/WalBootstrapSync](/zh/io/wal-bootstrap-sync/)
- [IO/WalBootstrapWrite](/zh/io/wal-bootstrap-write/)
- [IO/WalCopyRead](/zh/io/wal-copy-read/)
- [IO/WalCopySync](/zh/io/wal-copy-sync/)
- [IO/WalCopyWrite](/zh/io/wal-copy-write/)
- [IO/WalInitSync](/zh/io/wal-init-sync/)
- [IO/WalInitWrite](/zh/io/wal-init-write/)
- [IO/WalRead](/zh/io/wal-read/)
- [IO/WalSummaryRead](/zh/io/wal-summary-read/)
- [IO/WalSummaryWrite](/zh/io/wal-summary-write/)
- [IO/WalSync](/zh/io/wal-sync/)
- [IO/WalSyncMethodAssign](/zh/io/wal-sync-method-assign/)
- [IO/WalWrite](/zh/io/wal-write/)
- [IO/WalsenderTimelineHistoryRead](/zh/io/walsender-timeline-history-read/)