Thread: pgsql: doc: Mention de-normalization of deallocated entries in pg_stat_
doc: Mention de-normalization of deallocated entries in pg_stat_statements The current implementation of query normalization in pg_stat_statements is optimistic. If an entry is deallocated between the post-analyze hook and the planner and/or execution hook, it can be possible to find query strings with literal constant values (like "SELECT 1, 2") rather than their normalized flavor (like "SELECT $1, $2"). This commit adds in the documentation a paragraph about this limitation, and that this risk can be reduced by increasing pg_stat_statements.max, particularly if pg_stat_statements_info reports a high number of deallocations. Author: Sami Imseih Discussion: https://postgr.es/m/9CFF3512-355B-4676-8CCC-6CF622F4DC1A@amazon.com Branch ------ master Details ------- https://git.postgresql.org/pg/commitdiff/6da67a0c111a29e876b7172d081c7d152d23ea3d Modified Files -------------- doc/src/sgml/pgstatstatements.sgml | 10 ++++++++++ 1 file changed, 10 insertions(+)