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reorg - pg_reorg: New Directory 2+ messages / 2 participants [nested] [flat]
* reorg - pg_reorg: New Directory @ 2009-04-22 07:25 User Itagaki <itagaki@pgfoundry.org> 0 siblings, 0 replies; 2+ messages in thread From: itagaki@pgfoundry.org @ 2009-04-22 07:25 UTC (permalink / raw) To: pgsql-committers Update of /cvsroot/reorg/pg_reorg/bin/pgut In directory pgfoundry.org:/tmp/cvs-serv53370/pgut Log Message: Directory /cvsroot/reorg/pg_reorg/bin/pgut added to the repository ^ permalink raw reply [nested|flat] 2+ messages in thread
* pgsql: Add XLogCtl->logInsertResult @ 2024-04-07 12:08 Alvaro Herrera <alvherre@alvh.no-ip.org> 0 siblings, 0 replies; 2+ messages in thread From: Alvaro Herrera @ 2024-04-07 12:08 UTC (permalink / raw) To: pgsql-committers@lists.postgresql.org Add XLogCtl->logInsertResult This tracks the position of WAL that's been fully copied into WAL buffers by all processes emitting WAL. (For some reason we call that "WAL insertion"). This is updated using atomic monotonic advance during WaitXLogInsertionsToFinish, which is not when the insertions actually occur, but it's the only place where we know where have all the insertions have completed. This value is useful in WALReadFromBuffers, which can verify that callers don't try to read past what has been inserted. (However, more infrastructure is needed in order to actually use WAL after the flush point, since it could be lost.) The value is also useful in WaitXLogInsertionsToFinish() itself, since we can now exit quickly when all WAL has been already inserted, without even having to take any locks. Branch ------ master Details ------- https://git.postgresql.org/pg/commitdiff/f3ff7bf83bce11709add9a6d31d4bebe95e086e3 Modified Files -------------- src/backend/access/transam/xlog.c | 40 ++++++++++++++++++++++++++++++++++++++- src/include/port/atomics.h | 36 +++++++++++++++++++++++++++++++++++ 2 files changed, 75 insertions(+), 1 deletion(-) ^ permalink raw reply [nested|flat] 2+ messages in thread
end of thread, other threads:[~2024-04-07 12:08 UTC | newest] Thread overview: 2+ messages (download: mbox mbox.gz follow: Atom feed) -- links below jump to the message on this page -- 2009-04-22 07:25 reorg - pg_reorg: New Directory User Itagaki <itagaki@pgfoundry.org> 2024-04-07 12:08 pgsql: Add XLogCtl->logInsertResult Alvaro Herrera <alvherre@alvh.no-ip.org>
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