{"kind": "metric", "major": "18", "item": {"slug": "pg_stat_io-op_bytes", "name": "pg_stat_io.op_bytes", "name_zh": "", "category": "pg_stat_io", "summary": "Not recorded in the selected version.", "aliases": ["op_bytes", "pg_stat_io"], "content_hash": "e600e7951e8b10d594639cbe7722d6771ea0dd30c4fc7cee0d546d4e29d0fc4c", "versions": {"16": {"view": "pg_stat_io", "facts": [{"label": "View", "value": "pg_stat_io"}, {"label": "Field", "value": "op_bytes"}, {"label": "SQL type", "value": "bigint"}, {"label": "Units named in the field definition", "value": "bytes"}, {"label": "Reset observation", "value": "Time at which these statistics were last reset."}], "field": "op_bytes", "tables": [], "related": [{"url": "/wiki/catalog/pg_stat_io/?v=16", "label": "pg_stat_io columns"}, {"url": "/docs/16/monitoring-stats.html", "label": "Statistics collection and reset functions"}], "release": {"ref": "https://ftp.postgresql.org/pub/source/v16.15/postgresql-16.15.tar.bz2", "label": "16.15", "major": "16", "channel": "stable", "revision": "c1575341fa7bd40f5274ea465b34390f4dc64cdd0770af327005caaeb9f6b7ed"}, "sources": [{"url": "/docs/16/monitoring-stats.html#PG-STAT-IO-VIEW", "path": "monitoring-stats.html", "label": "PostgreSQL 16 English manual", "sha256": "a4c274defe8a41ff2895040cd542b5499063b844669ff3336de1a1317c3fe086"}], "sections": [{"title": "View semantics", "paragraphs": ["The pg_stat_io view will contain one row for each combination of backend type, target I/O object, and I/O context, showing cluster-wide I/O statistics. Combinations which do not make sense are omitted.\n\nCurrently, I/O on relations (e.g. tables, indexes) is tracked. However, relation I/O which bypasses shared buffers (e.g. when moving a table from one tablespace to another) is currently not tracked."]}, {"title": "Collection and reset context", "paragraphs": ["Read the same-version statistics collection and view documentation below for reset scope and visibility. No per-field reset rule is inferred from the field name."]}, {"code": "SELECT op_bytes FROM pg_catalog.pg_stat_io;", "title": "Inspect this field", "paragraphs": ["Example query; no execution result or measured value is asserted."]}], "sql_type": "bigint", "signature": "SELECT op_bytes FROM pg_catalog.pg_stat_io;", "documented": true, "description": ["The number of bytes per unit of I/O read, written, or extended.\n\nRelation data reads, writes, and extends are done in block_size units, derived from the build-time parameter BLCKSZ, which is 8192 by default."], "manual_html": "", "manual_path": "/docs/16/monitoring-stats.html", "source_only": false, "comparison_data": {"view": "pg_stat_io", "field": "op_bytes", "sql_type": "bigint", "units_mentioned": ["bytes"]}, "comparison_hash": "46e9d3530a117c181e304599e8a6d6e96c07171b7e30e0c31adae3aec8c79b75", "units_mentioned": ["bytes"]}, "17": {"view": "pg_stat_io", "facts": [{"label": "View", "value": "pg_stat_io"}, {"label": "Field", "value": "op_bytes"}, {"label": "SQL type", "value": "bigint"}, {"label": "Units named in the field definition", "value": "bytes"}, {"label": "Reset observation", "value": "Time at which these statistics were last reset."}], "field": "op_bytes", "tables": [], "related": [{"url": "/wiki/catalog/pg_stat_io/?v=17", "label": "pg_stat_io columns"}, {"url": "/docs/17/monitoring-stats.html", "label": "Statistics collection and reset functions"}], "release": {"ref": "https://ftp.postgresql.org/pub/source/v17.11/postgresql-17.11.tar.bz2", "label": "17.11", "major": "17", "channel": "stable", "revision": "dd27f2b3c59e73ed14aa3324901242bf69a032a6347805f274e6260322d42979"}, "sources": [{"url": "/docs/17/monitoring-stats.html#PG-STAT-IO-VIEW", "path": "monitoring-stats.html", "label": "PostgreSQL 17 English manual", "sha256": "007af6e8ab39b925963273ec3ba7f06f8ee6fbfaad821f07a1dc78383dbb9b99"}], "sections": [{"title": "View semantics", "paragraphs": ["The pg_stat_io view will contain one row for each combination of backend type, target I/O object, and I/O context, showing cluster-wide I/O statistics. Combinations which do not make sense are omitted.\n\nCurrently, I/O on relations (e.g. tables, indexes) is tracked. However, relation I/O which bypasses shared buffers (e.g. when moving a table from one tablespace to another) is currently not tracked."]}, {"title": "Collection and reset context", "paragraphs": ["Read the same-version statistics collection and view documentation below for reset scope and visibility. No per-field reset rule is inferred from the field name."]}, {"code": "SELECT op_bytes FROM pg_catalog.pg_stat_io;", "title": "Inspect this field", "paragraphs": ["Example query; no execution result or measured value is asserted."]}], "sql_type": "bigint", "signature": "SELECT op_bytes FROM pg_catalog.pg_stat_io;", "documented": true, "description": ["The number of bytes per unit of I/O read, written, or extended.\n\nRelation data reads, writes, and extends are done in block_size units, derived from the build-time parameter BLCKSZ, which is 8192 by default."], "manual_html": "", "manual_path": "/docs/17/monitoring-stats.html", "source_only": false, "comparison_data": {"view": "pg_stat_io", "field": "op_bytes", "sql_type": "bigint", "units_mentioned": ["bytes"]}, "comparison_hash": "46e9d3530a117c181e304599e8a6d6e96c07171b7e30e0c31adae3aec8c79b75", "units_mentioned": ["bytes"]}}}, "snapshot": null, "comparison": {"left": "17", "right": "18", "status": "removed", "diff": "--- PostgreSQL 17\n+++ PostgreSQL 18\n@@ -1,8 +1 @@\n-{\n-  \"field\": \"op_bytes\",\n-  \"sql_type\": \"bigint\",\n-  \"units_mentioned\": [\n-    \"bytes\"\n-  ],\n-  \"view\": \"pg_stat_io\"\n-}\n+Not recorded in this version"}}