[#1011107] Add the ability to log queries being sent by the client...

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2011-10-16 16:54
Submitted by:
Sean Chittenden (seanc)
Assigned to:
Marko Kreen (mkz)
Add the ability to log queries being sent by the client...

Detailed description
In rare circumstances I've had failing Pg installs (due to bad hardware) crash before logging messages are fired off. The following makes it easier to diagnose problems. This isn't ideal, but hopefully it's workable. -sc

Index: src/client.c
RCS file: /cvsroot/pgbouncer/pgbouncer/src/client.c,v
retrieving revision 1.31
diff -u -r1.31 client.c
--- src/client.c 19 Jul 2010 07:30:15 -0000 1.31
+++ src/client.c 16 Oct 2011 16:53:06 -0000
@@ -295,6 +295,9 @@

/* one-packet queries */
case 'Q': /* Query */
+ if (pkt->type == 'Q') {
+ slog_noise(client, "Client sent query (%d): %.*s", mbuf_size(&pkt->data), mbuf_size(&pkt->data), mbuf_get_string(&pkt->data));
+ }
case 'F': /* FunctionCall */

/* copy end markers */


Date: 2012-05-29 21:59
Sender: Marko Kreen

Well, it fails if query does not fit buffer.

Also there are many places that cannot allow to be run with noise log level.

And it does not log extended queries.

Yes, it can be useful in specific circumstances, even common ones, but it does not look like it can be improved to have generic logging solution in pgbouncer.
Date: 2012-05-29 21:19
Sender: Sean Chittenden

What would you like to see in addition to this?

This patch has saved me a few times now, notably when the database has some internal block corruption, the query is never logged by PostgreSQL in those cases, so having pgbouncer log things is invaluable when trying to find the problematic set of ctids.
Date: 2012-05-29 21:11
Sender: Marko Kreen

Seems I have not commented here yet. Sorry.

Basically, I don't agree that it's robust enough functionality to be in main product.

But I leave the patch open, so if anyone requires this get get the patch here. As a quick hack to get SQL log from pgbouncer, it's fine.

Attached Files:



Field Old Value Date By
assigned_tonone2012-05-29 21:59mkz
File Added693: pgbouncer-src-client.c.patch2011-10-16 16:54seanc
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