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
------
master
Details
-------
https://git.postgresql.org/pg/commitdiff/6897f0ec024582a570868939d3f34a6853374723
Modified Files
--------------
src/backend/storage/ipc/procarray.c | 17 +++++++++++------
1 file changed, 11 insertions(+), 6 deletions(-)