From: | Thomas Munro <tmunro(at)postgresql(dot)org> |
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To: | pgsql-committers(at)lists(dot)postgresql(dot)org |
Subject: | pgsql: Move RecoveryLockList into a hash table. |
Date: | 2018-06-26 07:11:29 |
Message-ID: | E1fXi8P-0004vt-Pf@gemulon.postgresql.org |
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Lists: | pgsql-committers |
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
Branch
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REL_10_STABLE
Details
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https://git.postgresql.org/pg/commitdiff/88554c0911018c1c60423fbb60557626142dec10
Modified Files
--------------
src/backend/storage/ipc/standby.c | 164 ++++++++++++++++++++------------------
1 file changed, 87 insertions(+), 77 deletions(-)
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