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Prefetch cleanup: (#2876)

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- **Enable `enable_seqscan_prefetch` by default**
- Drop use of `seqscan_prefetch_buffers` in favor of
`[maintenance,effective]_io_concurrency`
This includes adding some fields to the HeapScan execution node, and
vacuum state.
- Cleanup some conditionals in vacuumlazy.c
- Clarify enable_seqscan_prefetch GUC description
- Fix issues in heap SeqScan prefetching where synchronize_seqscan
machinery wasn't handled properly.
This commit is contained in:
MMeent
2022-12-02 13:35:01 +01:00
committed by GitHub
parent d90b52b405
commit 145e7e4b96
4 changed files with 10 additions and 9 deletions
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3
.github/workflows/benchmarking.yml vendored
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@@ -232,7 +232,8 @@ jobs:
if: matrix.platform == 'neon-captest-prefetch'
run: |
psql ${BENCHMARK_CONNSTR} -c "ALTER DATABASE neondb SET enable_seqscan_prefetch=on"
psql ${BENCHMARK_CONNSTR} -c "ALTER DATABASE neondb SET seqscan_prefetch_buffers=10"
psql ${BENCHMARK_CONNSTR} -c "ALTER DATABASE neondb SET effective_io_concurrency=32"
psql ${BENCHMARK_CONNSTR} -c "ALTER DATABASE neondb SET maintenance_io_concurrency=32"
env:
BENCHMARK_CONNSTR: ${{ steps.set-up-connstr.outputs.connstr }}