Exclude the metrics fetching session's data from pg_stat_activity #1185
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To reduce the observer effect, filter out pg_stat_activity rows of the postgres_exporter session from all SA queries, based on pid / procpid. A bit annoying to see idling DBs showing pg_stat_activity_count "active" count of 1 Signed-off-by: Kaarel Moppel <kaarel.moppel@gmail.com>
kmoppel force-pushed the exclude-collecting-query-from-pg-stat-activity branch from aa2f47b to 3fc80a7 Compare 
sysadmind approved these changes Aug 26, 2025
maxenglander added a commit to planetscale/postgres_exporter that referenced this pull request Sep 10, 2025
…vity (prometheus-community#1185)" This reverts commit 198454c. Signed-off-by: Max Englander <max@planetscale.com>
maxenglander added a commit to planetscale/postgres_exporter that referenced this pull request Sep 10, 2025
…vity (prometheus-community#1185)" (#7) This reverts commit 198454c. prometheus-community#1185 appears to have broken some things: > {"time":"2025-09-10T03:57:53.677992156Z","level":"ERROR","source":"collector.go:223","msg":"collector failed","name":"long_running_transactions","duration_seconds":0.010053746,"err":"sql: Scan error on column index 1, name \"oldest_timestamp_seconds\": converting NULL to float64 is unsupported"} > {"time":"2025-09-10T03:57:53.679318983Z","level":"ERROR","source":"collector.go:223","msg":"collector failed","name":"process_idle","duration_seconds":0.011370523,"err":"pq: syntax error at or near \";\""} Signed-off-by: Max Englander <max@planetscale.com>
nikitos reviewed Sep 10, 2025
| COUNT(*) AS process_idle_seconds_count | ||
| FROM pg_stat_activity | ||
| WHERE state ~ '^idle' | ||
| AND pid <> pg_backend_pid(); |
Merged
sysadmind added a commit to sysadmind/postgres_exporter that referenced this pull request Sep 24, 2025
This semicolon breaks the query Signed-off-by: Joe Adams <github@joeadams.io>
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To reduce the observer effect, filter out pg_stat_activity rows of the postgres_exporter session from all SA queries, based on pid / procpid.
A bit annoying to see idling DBs showing pg_stat_activity_count "active" count of 1. Other Postgres monitoring tools (like pgwatch for example) take it into account