Thread: pgsql: Use DELETE instead of UPDATE to speed up vacuum test
Use DELETE instead of UPDATE to speed up vacuum test e2e992820f104def introduced a test which generated dead tuples for vacuum with an UPDATE. The test only required enough dead TIDs for two rounds of index vacuuming. This can be accomplished with a DELETE instead of an UPDATE -- which generates about 50% less WAL and makes the test 20% faster in many cases. The test takes several seconds (more on slow buildfarm animals) because we need quite a few tuples to trigger two rounds of index vacuuming; so it is worth a follow-on commit to speed it up. Suggested-by: Masahiko Sawada Discussion: https://postgr.es/m/CAAKRu_bWmMjmqL%2BOZ2duEQ80u7cRvpsExLNZNjzk-pXX5skwMQ%40mail.gmail.com Backpatch-through: 14, the first version containing this test. Branch ------ REL_15_STABLE Details ------- https://git.postgresql.org/pg/commitdiff/9744fe24118ba5738dda9008533ed00227f5d069 Modified Files -------------- src/test/recovery/t/043_vacuum_horizon_floor.pl | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)