Use WaitLatch, not pg_usleep, for delaying in pg_sleep().
This avoids platform-dependent behavior wherein pg_sleep() might fail to be
interrupted by statement timeout, query cancel, SIGTERM, etc. Also, since
there's no reason to wake up once a second any more, we can reduce the
power consumption of a sleeping backend a tad.
Back-patch to 9.3, since use of SA_RESTART for SIGALRM makes this a bigger
issue than it used to be.
Branch
------
REL9_3_STABLE
Details
-------
http://git.postgresql.org/pg/commitdiff/c38b64c2959662298f23ad5d86246009e7853b75
Modified Files
--------------
src/backend/utils/adt/misc.c | 27 +++++++++++++++++----------
1 file changed, 17 insertions(+), 10 deletions(-)