From 6e390c9b9d8784a7f37e2eb2d304d30ca2dc6c3a Mon Sep 17 00:00:00 2001 From: Christopher Baines Date: Sun, 27 Dec 2020 10:37:06 +0000 Subject: Increase statistics targets for the derivation_inputs table It has a lot of rows, and this seems to help the query planning for select-required-builds-that-failed, as I think it helps PostgreSQL better estimate the row counts that different parts of the query will produce. --- sqitch/deploy/increase_derivation_inputs_statistics_targets.sql | 8 ++++++++ 1 file changed, 8 insertions(+) create mode 100644 sqitch/deploy/increase_derivation_inputs_statistics_targets.sql (limited to 'sqitch/deploy') diff --git a/sqitch/deploy/increase_derivation_inputs_statistics_targets.sql b/sqitch/deploy/increase_derivation_inputs_statistics_targets.sql new file mode 100644 index 0000000..e0da041 --- /dev/null +++ b/sqitch/deploy/increase_derivation_inputs_statistics_targets.sql @@ -0,0 +1,8 @@ +-- Deploy guix-data-service:increase_derivation_inputs_statistics_targets to pg + +BEGIN; + +ALTER TABLE derivation_inputs ALTER COLUMN derivation_id SET STATISTICS 10000; +ALTER TABLE derivation_inputs ALTER COLUMN derivation_output_id SET STATISTICS 10000; + +COMMIT; -- cgit v1.2.3