postgrespro.git / summary / log / commit / refs

commit    ef02fb15a35ab7bd74a79afebf35572ed82b5e9f
Author:   Thomas Munro <tmunro@postgresql.org>
Date:     Fri Jan 31 04:21:47 2020 +0000

    Report time spent in posix_fallocate() as a wait event.
    
    When allocating DSM segments with posix_fallocate() on Linux (see commit
    899bd785), report this activity as a wait event exactly as we would if
    we were using file-backed DSM rather than shm_open()-backed DSM.
    
    Author: Thomas Munro
    Discussion: https://postgr.es/m/CA%2BhUKGKCSh4GARZrJrQZwqs5SYp0xDMRr9Bvb%2BHQzJKvRgL6ZA%40mail.gmail.com


 src/backend/storage/ipc/dsm_impl.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/backend/storage/ipc/dsm_impl.c b/src/backend/storage/ipc/dsm_impl.c
index 3f7a8a4fa0..138bdec47e 100644
--- a/src/backend/storage/ipc/dsm_impl.c
+++ b/src/backend/storage/ipc/dsm_impl.c
@@ -371,10 +371,12 @@ dsm_impl_posix_resize(int fd, off_t size)
 		 * interrupt pending.  This avoids the possibility of looping forever
 		 * if another backend is repeatedly trying to interrupt us.
 		 */
+		pgstat_report_wait_start(WAIT_EVENT_DSM_FILL_ZERO_WRITE);
 		do
 		{
 			rc = posix_fallocate(fd, 0, size);
 		} while (rc == EINTR && !(ProcDiePending || QueryCancelPending));
+		pgstat_report_wait_end();
 
 		/*
 		 * The caller expects errno to be set, but posix_fallocate() doesn't


[parent: d061ea21fc1c]