Provide interim statistics while in mid-checkpoint.

Re-implements similar functionality in 9.1 and previously which
was removed during split of checkpointer and bgwriter.

Requested/spotted by Magnus Hagander

diff --git a/src/backend/postmaster/checkpointer.c b/src/backend/postmaster/checkpointer.c
index 5db60cd5d982677b3b3b086f1a996917ecf63251..aa3df37324789c5fe8bac0c62b2d0233e855e9c5 100644 (file)
--- a/src/backend/postmaster/checkpointer.c
+++ b/src/backend/postmaster/checkpointer.c
@@ -708,6 +708,11 @@ CheckpointWriteDelay(int flags, double progress)
 
                CheckArchiveTimeout();
 
+               /*
+                * Report interim activity statistics to the stats collector.
+                */
+               pgstat_send_bgwriter();
+
                /*
                 * This sleep used to be connected to bgwriter_delay, typically 200ms.
                 * That resulted in more frequent wakeups if not much work to do.