From 9fbc3f318d039c3e1e8614c38e40843cf8fcffde Mon Sep 17 00:00:00 2001 From: Fujii Masao Date: Thu, 26 Nov 2020 21:18:05 +0900 Subject: pg_stat_statements: Track number of times pgss entries were deallocated. If more distinct statements than pg_stat_statements.max are observed, pg_stat_statements entries about the least-executed statements are deallocated. This commit enables us to track the total number of times those entries were deallocated. That number can be viewed in the pg_stat_statements_info view that this commit adds. It's useful when tuning pg_stat_statements.max parameter. If it's high, i.e., the entries are deallocated very frequently, which might cause the performance regression and we can increase pg_stat_statements.max to avoid those frequent deallocations. The pg_stat_statements_info view is intended to display the statistics of pg_stat_statements module itself. Currently it has only one column "dealloc" indicating the number of times entries were deallocated. But an upcoming patch will add other columns (for example, the time at which pg_stat_statements statistics were last reset) into the view. Author: Katsuragi Yuta, Yuki Seino Reviewed-by: Fujii Masao Discussion: https://postgr.es/m/0d9f1107772cf5c3f954e985464c7298@oss.nttdata.com --- src/tools/pgindent/typedefs.list | 1 + 1 file changed, 1 insertion(+) (limited to 'src') diff --git a/src/tools/pgindent/typedefs.list b/src/tools/pgindent/typedefs.list index 4c40ae37b26..b8ca8cffd91 100644 --- a/src/tools/pgindent/typedefs.list +++ b/src/tools/pgindent/typedefs.list @@ -3215,6 +3215,7 @@ pgpid_t pgsocket pgsql_thing_t pgssEntry +pgssGlobalStats pgssHashKey pgssJumbleState pgssLocationLen -- cgit v1.2.3