{"Entry":{"collection":"metric","key":"pg_stat_io-extend_bytes","name":"pg_stat_io.extend_bytes","aliases":["extend_bytes","pg_stat_io"],"metadata":{"aliases":["extend_bytes","pg_stat_io"],"category":"pg_stat_io","content_hash":"57621bdff3ca0b939d05b718ff0301dcea03a69b49e07d9ee8192022550750ea","imported_at":"2026-09-30T00:40:45.654233+08:00","name":"pg_stat_io.extend_bytes","name_zh":"","slug":"pg_stat_io-extend_bytes","summary":"The total size of relation extend operations in bytes."}},"Definition":{"Collection":"metric","Key":"pg_stat_io-extend_bytes","SourceDatabase":"center","Version":"18","SourceTable":"statistics_metric","SourceKey":"pg_stat_io-extend_bytes","SourceRevision":"555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f","Facts":{"comparison_data":{"field":"extend_bytes","sql_type":"numeric","units_mentioned":["bytes"],"view":"pg_stat_io"},"comparison_hash":"eefa69b14598ed50866d800238301a0ad8746aafb5bfd583da332f6911c2258f","description":["The total size of relation extend operations in bytes."],"documented":true,"facts":[{"label":"View","value":"pg_stat_io"},{"label":"Field","value":"extend_bytes"},{"label":"SQL type","value":"numeric"},{"label":"Units named in the field definition","value":"bytes"},{"label":"Reset observation","value":"Time at which these statistics were last reset."}],"field":"extend_bytes","manual_html":"","manual_path":"/docs/18/monitoring-stats.html","related":[{"label":"pg_stat_io columns","url":"/wiki/catalog/pg_stat_io/?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_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. 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