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| author | Noah Misch <noah@leadboat.com> | 2024-10-29 09:39:55 -0700 |
|---|---|---|
| committer | Noah Misch <noah@leadboat.com> | 2024-10-29 09:39:59 -0700 |
| commit | 0fe002d0c9a5b04bb676e9cb8f80325f7129b5f3 (patch) | |
| tree | 5dafc615e6f2b60affdfa8e87c68e997d0ef8c79 /src/backend/jit/llvm/llvmjit_wrap.cpp | |
| parent | 74f70cb8633d186928fad24ff60d922613f89c6d (diff) | |
| download | postgresql-0fe002d0c9a5b04bb676e9cb8f80325f7129b5f3.tar.gz postgresql-0fe002d0c9a5b04bb676e9cb8f80325f7129b5f3.zip | |
Unpin buffer before inplace update waits for an XID to end.
Commit a07e03fd8fa7daf4d1356f7cb501ffe784ea6257 changed inplace updates
to wait for heap_update() commands like GRANT TABLE and GRANT DATABASE.
By keeping the pin during that wait, a sequence of autovacuum workers
and an uncommitted GRANT starved one foreground LockBufferForCleanup()
for six minutes, on buildfarm member sarus. Prevent, at the cost of a
bit of complexity. Back-patch to v12, like the earlier commit. That
commit and heap_inplace_lock() have not yet appeared in any release.
Discussion: https://postgr.es/m/20241026184936.ae.nmisch@google.com
Diffstat (limited to 'src/backend/jit/llvm/llvmjit_wrap.cpp')
0 files changed, 0 insertions, 0 deletions