Poll postmaster less frequently in recovery. Since commits 9f095299 and f98b8476 we don't poll the postmaster pipe at all during crash recovery on Linux and FreeBSD, but on other operating systems we were still doing it for every WAL record. Do it less frequently on operating systems where system calls are required, at the cost of delaying exit a bit after postmaster death. This avoids expensive system calls reported to slow down CPU-bound recovery by as much as 10-30%.
Reviewed-by: Heikki Linnakangas <[email protected]> Reviewed-by: Fujii Masao <[email protected]> Reviewed-by: Michael Paquier <[email protected]> Discussion: https://postgr.es/m/CA%2BhUKGK1607VmtrDUHQXrsooU%3Dap4g4R2yaoByWOOA3m8xevUQ%40mail.gmail.com Discussion: https://postgr.es/m/[email protected] Branch ------ master Details ------- https://git.postgresql.org/pg/commitdiff/57dcc2ef3320de3e1aef6f668601e6ad2bdf88c4 Modified Files -------------- src/backend/postmaster/startup.c | 25 +++++++++++++++++++++++-- 1 file changed, 23 insertions(+), 2 deletions(-)
