{"Entry":{"collection":"metric","key":"pg_stat_recovery_prefetch-io_depth","name":"pg_stat_recovery_prefetch.io_depth","aliases":["io_depth","pg_stat_recovery_prefetch"],"metadata":{"aliases":["io_depth","pg_stat_recovery_prefetch"],"category":"pg_stat_recovery_prefetch","content_hash":"7f6b684bf049fb7cad3dc7d8c22b04e30e8e19b4f9764d68822c14da8989a356","imported_at":"2026-09-30T00:40:46.035879+08:00","name":"pg_stat_recovery_prefetch.io_depth","name_zh":"","slug":"pg_stat_recovery_prefetch-io_depth","summary":"How many prefetches have been initiated but are not yet known to have completed"}},"Definition":{"Collection":"metric","Key":"pg_stat_recovery_prefetch-io_depth","SourceDatabase":"center","Version":"18","SourceTable":"statistics_metric","SourceKey":"pg_stat_recovery_prefetch-io_depth","SourceRevision":"555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f","Facts":{"comparison_data":{"field":"io_depth","sql_type":"int","units_mentioned":[],"view":"pg_stat_recovery_prefetch"},"comparison_hash":"88500a16fbd09887ff661140d88df22ddddbfb56bdf88ee7f7449cc2c0bb0ad7","description":["How many prefetches have been initiated but are not yet known to have completed"],"documented":true,"facts":[{"label":"View","value":"pg_stat_recovery_prefetch"},{"label":"Field","value":"io_depth"},{"label":"SQL type","value":"int"},{"label":"Units named in the field definition","value":"Not specified"},{"label":"Reset observation","value":"Time at which these statistics were last reset"}],"field":"io_depth","manual_html":"","manual_path":"/docs/18/monitoring-stats.html","related":[{"label":"pg_stat_recovery_prefetch columns","url":"/wiki/catalog/pg_stat_recovery_prefetch/?v=18"},{"label":"Statistics collection and reset functions","url":"/docs/18/monitoring-stats.html"}],"release":{"channel":"stable","label":"18.6","major":"18","ref":"https://ftp.postgresql.org/pub/source/v18.6/postgresql-18.6.tar.bz2","revision":"555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f"},"sections":[{"paragraphs":["The pg_stat_recovery_prefetch view will contain only one row. 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The columns wal_distance, block_distance and io_depth show current values, and the other columns show cumulative counters that can be reset with the pg_stat_reset_shared function."],"title":"View semantics"},{"paragraphs":["The pg_stat_recovery_prefetch view will contain only one row. The columns wal_distance , block_distance and io_depth show current values, and the other columns show cumulative counters that can be reset with the pg_stat_reset_shared function."],"title":"Collection and reset context"},{"code":"SELECT io_depth FROM pg_catalog.pg_stat_recovery_prefetch;","paragraphs":["Example query; no execution result or measured value is asserted."],"title":"Inspect this field"}],"tables":[]}},"RequestedLocale":"zh-Hans","Fallback":true,"Versions":["15","16","17","18","19","20"],"Locales":["en"],"Signatures":null,"Spellings":null,"SQLState":null,"Evidence":null}