Wiki / Statistics & Metrics / pg_stat_activity
pg_stat_activity.xact_start
Time when this process' current transaction was started, or null if no transaction is active. If the current query is the first of its transaction, this column is equal to the query_start column.
Reading PostgreSQL 18.6.
Description
Time when this process' current transaction was started, or null if no transaction is active. If the current query is the first of its transaction, this column is equal to the query_start column.
- View
- pg_stat_activity
- Field
- xact_start
- SQL type
- timestamp with time zone
- Units named in the field definition
- Not specified
- Reset observation
- No stats_reset field is documented for this view
Usage
SELECT xact_start FROM pg_catalog.pg_stat_activity;View semantics
The pg_stat_activity view will have one row per server process, showing information related to the current activity of that process.
Collection and reset context
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.
Inspect this field
Example query; no execution result or measured value is asserted.
SELECT xact_start FROM pg_catalog.pg_stat_activity;Related entries
Documentation and source
Source build
- Version
- 18.6
- Build
- https://ftp.postgresql.org/pub/source/v18.6/postgresql-18.6.tar.bz2
- Source fingerprint
555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f
Compare versions
PostgreSQL 17 → 18: unchanged.
Compares recorded interfaces and attributes. Source fingerprints and build metadata are excluded; an absent sample is not proof of the introduction or removal release.
Related entries
pg_stat_activity.application_namepg_stat_activity.backend_startpg_stat_activity.backend_typepg_stat_activity.backend_xidpg_stat_activity.backend_xminpg_stat_activity.client_addrpg_stat_activity.client_hostnamepg_stat_activity.client_portpg_stat_activity.datidpg_stat_activity.datnamepg_stat_activity.leader_pidpg_stat_activity.pid
Export JSON · Back to Statistics & Metrics · Recorded in PostgreSQL 10 through 20; the first sample is not necessarily its introduction.