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| author | Melanie Plageman <melanieplageman@gmail.com> | 2024-07-29 15:36:55 -0400 |
|---|---|---|
| committer | Melanie Plageman <melanieplageman@gmail.com> | 2024-07-29 15:42:10 -0400 |
| commit | 9744fe24118ba5738dda9008533ed00227f5d069 (patch) | |
| tree | b834bae2ec41604bc233e6b740b7b8c40229ac52 /src/backend/commands/variable.c | |
| parent | 0a80e88d902d3dfdeed03ede1880b8994a8d892b (diff) | |
| download | postgresql-9744fe24118ba5738dda9008533ed00227f5d069.tar.gz postgresql-9744fe24118ba5738dda9008533ed00227f5d069.zip | |
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.
Diffstat (limited to 'src/backend/commands/variable.c')
0 files changed, 0 insertions, 0 deletions