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| author | Fujii Masao <fujii@postgresql.org> | 2024-10-25 00:18:32 +0900 |
|---|---|---|
| committer | Fujii Masao <fujii@postgresql.org> | 2024-10-25 00:18:32 +0900 |
| commit | 86c30cef4a4cae951b2c30f1790fd5a7b81a2946 (patch) | |
| tree | cc765705c2dea41ff8e7b9896bce3c2126e5101f /src/backend/access/transam/parallel.c | |
| parent | 45188c2ea2391b7b24039e1632c726e2fc6b8008 (diff) | |
| download | postgresql-86c30cef4a4cae951b2c30f1790fd5a7b81a2946.tar.gz postgresql-86c30cef4a4cae951b2c30f1790fd5a7b81a2946.zip | |
Refactor GetLockStatusData() to skip backends/groups without fast-path locks.
Previously, GetLockStatusData() checked all slots for every backend
to gather fast-path lock data, which could be inefficient. This commit
refactors it by skipping backends with PID=0 (since they don't hold
fast-path locks) and skipping groups with no registered fast-path locks,
improving efficiency.
This refactoring is particularly beneficial, for example when
max_connections and max_locks_per_transaction are set high,
as it reduces unnecessary checks across numerous slots.
Author: Fujii Masao
Reviewed-by: Bertrand Drouvot
Discussion: https://postgr.es/m/a0a00c44-31e9-4c67-9846-fb9636213ac9@oss.nttdata.com
Diffstat (limited to 'src/backend/access/transam/parallel.c')
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