| From: | Alexander Korotkov <akorotkov(at)postgresql(dot)org> |
|---|---|
| To: | pgsql-committers(at)lists(dot)postgresql(dot)org |
| Subject: | pgsql: Optimize memory access in GetRunningTransactionData() |
| Date: | 2024-07-03 23:21:13 |
| Message-ID: | E1sP9Hk-000DNB-Cz@gemulon.postgresql.org |
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| Lists: | pgsql-committers |
Optimize memory access in GetRunningTransactionData()
e85662df44 made GetRunningTransactionData() calculate the oldest running
transaction id within the current database. This commit optimized this
calculation by performing a cheap transaction id comparison before fetching
the process database id, while the latter could cause extra cache misses.
Reported-by: Noah Misch
Discussion: https://postgr.es/m/20240630231816.bf.nmisch%40google.com
Branch
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master
Details
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https://git.postgresql.org/pg/commitdiff/6897f0ec024582a570868939d3f34a6853374723
Modified Files
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src/backend/storage/ipc/procarray.c | 17 +++++++++++------
1 file changed, 11 insertions(+), 6 deletions(-)
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