Improve tests for postmaster death in auxiliary processes. In checkpointer and walwriter, avoid calling PostmasterIsAlive unless WaitLatch has reported WL_POSTMASTER_DEATH. This saves a kernel call per iteration of the process's outer loop, which is not all that much, but a cycle shaved is a cycle earned. I had already removed the unconditional PostmasterIsAlive calls in bgwriter and pgstat in previous patches, but forgot that WL_POSTMASTER_DEATH is supposed to be treated as untrustworthy (per comment in unix_latch.c); so adjust those two cases to match.
There are a few other places where the same idea might be applied, but only after substantial code rearrangement, so I didn't bother. Branch ------ master Details ------- http://git.postgresql.org/pg/commitdiff/fd71421b0187de0e2bf76ff66b4a9433bd96c4a0 Modified Files -------------- src/backend/postmaster/bgwriter.c | 6 ++++-- src/backend/postmaster/checkpointer.c | 23 +++++++++++++---------- src/backend/postmaster/pgstat.c | 9 +++++++-- src/backend/postmaster/walwriter.c | 23 +++++++++++++---------- 4 files changed, 37 insertions(+), 24 deletions(-) -- Sent via pgsql-committers mailing list (pgsql-committers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-committers
