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| author | Thomas Munro <tmunro@postgresql.org> | 2018-06-26 17:17:27 +1200 |
|---|---|---|
| committer | Thomas Munro <tmunro@postgresql.org> | 2018-06-26 17:17:27 +1200 |
| commit | 88554c0911018c1c60423fbb60557626142dec10 (patch) | |
| tree | 6234801915365d63c883f80cf33b31b8f817d56e /contrib/postgres_fdw/postgres_fdw.h | |
| parent | 324076a6261756d6f5b3514ed2b2f715b656ba90 (diff) | |
| download | postgresql-88554c0911018c1c60423fbb60557626142dec10.tar.gz postgresql-88554c0911018c1c60423fbb60557626142dec10.zip | |
Move RecoveryLockList into a hash table.
Standbys frequently need to release all locks held by a given xid.
Instead of searching one big list linearly, let's create one list
per xid and put them in a hash table, so we can find what we need
in O(1) time.
Earlier analysis and a prototype were done by David Rowley, though
this isn't his patch.
Back-patch all the way.
Author: Thomas Munro
Diagnosed-by: David Rowley, Andres Freund
Reviewed-by: Andres Freund, Tom Lane, Robert Haas
Discussion: https://postgr.es/m/CAEepm%3D1mL0KiQ2KJ4yuPpLGX94a4Ns_W6TL4EGRouxWibu56pA%40mail.gmail.com
Discussion: https://postgr.es/m/CAKJS1f9vJ841HY%3DwonnLVbfkTWGYWdPN72VMxnArcGCjF3SywA%40mail.gmail.com
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