git.postgresql.org Git - postgresql.git/commitdiff

diff --git a/src/backend/postmaster/pgstat.c b/src/backend/postmaster/pgstat.c

index c00b87c8f3712f3b10684163554c1c6147388888..5c3d700d2908ec46a6393f55e92ee7b8e404a61d 100644 (file)

--- a/src/backend/postmaster/pgstat.c

+++ b/src/backend/postmaster/pgstat.c

*

* Copyright (c) 2001-2010, PostgreSQL Global Development Group

*

- * $PostgreSQL: pgsql/src/backend/postmaster/pgstat.c,v 1.202 2010年03月12日 22:19:19 tgl Exp $

+ * $PostgreSQL: pgsql/src/backend/postmaster/pgstat.c,v 1.203 2010年03月24日 16:07:10 tgl Exp $

* ----------

*/

#include "postgres.h"

last_statwrite = globalStats.stats_timestamp;

/*

- * It's not entirely clear whether there could be clock skew between

- * backends and the collector; but just in case someone manages to

- * send us a stats request time that's in the future, reset it.

- * This ensures that no inquiry message can cause more than one stats

- * file write to occur.

+ * If there is clock skew between backends and the collector, we

+ * could receive a stats request time that's in the future. If so,

+ * complain and reset last_statrequest. Resetting ensures that no

+ * inquiry message can cause more than one stats file write to occur.

*/

if (last_statrequest > last_statwrite)

{

- elog(LOG, "last_statrequest is in the future, resetting");

+ char *reqtime;

+ char *mytime;

+

+ /* Copy because timestamptz_to_str returns a static buffer */

+ reqtime = pstrdup(timestamptz_to_str(last_statrequest));

+ mytime = pstrdup(timestamptz_to_str(last_statwrite));

+ elog(LOG, "last_statrequest %s is later than collector's time %s",

+ reqtime, mytime);

+ pfree(reqtime);

+ pfree(mytime);

+

last_statrequest = last_statwrite;

}

}