Case in point, from one of my databases last night. The count is the number of logs generated and the time is per hour intil the disk filled up at 01:16.
Count Name ----- ---- 106 24/06/2013 17:00:00 168 24/06/2013 18:00:00 1386 24/06/2013 19:00:00 9751 24/06/2013 20:00:00 8010 24/06/2013 21:00:00 9393 24/06/2013 22:00:00 9428 24/06/2013 23:00:00 11434 25/06/2013 00:00:00 1310 25/06/2013 01:00:00 From: [email protected] [mailto:[email protected]] On Behalf Of Sobey, Richard A Sent: 24 June 2013 22:09 To: [email protected] Subject: Re: [Exchange] Transaction logs - how many, how fast Some of our EDBs are approaching 300GB with fewer than 1000 mailboxes. Normal log generation is up to 10GB daily. I'll occasionally see some of the log disks use up to 20GB. But there is nothing normal about log generation per database - it's entirely dependent on the user profiles. Are you using a DAG? I usually run Exmon on the server where the active database copy lives. Not sure if running against the healthy copy will give you good results. Just once, though, I've also had to disable search indexing on the EDB. Still no idea why that helped! Richard From: "Heaton, Joseph@Wildlife" <[email protected]<mailto:[email protected]>> Reply-To: "[email protected]<mailto:[email protected]>" <[email protected]<mailto:[email protected]>> Date: Mon, 24 Jun 2013 20:55:51 +0000 To: "[email protected]<mailto:[email protected]>" <[email protected]<mailto:[email protected]>> Subject: [Exchange] Transaction logs - how many, how fast Exch 2010 I have 3 databases, Database 1 with 1020 mailboxes, Database2 with 1002 mailboxes, and Database 3 with 980 mailboxes. On Database 1, I'm getting 2-3 new transaction logs pretty much every second. This is filling up the drive rather quickly, taking about 30ishGB since last night. The drive had filled up last Friday, I expanded it by 200GB, and it was full again by Sunday night. I have been having some issues with backups, so that will help once the backup is successful, taking away well over 100GB, but it just doesn't seem right that I'm getting that many new transaction logs so quickly. I've run ExMon against the first server, but there aren't any mailboxes sticking out with really high CPU%, or LogBytes. The top box changes every refresh. Any other ideas of where to look, or is that rate of logs "normal" for databases this size? Thanks, Joe Heaton Enterprise Server Support CA Department of Fish and Wildlife 1807 13th Street, Suite 201 Sacramento, CA 95811 Desk: (916) 323-1284
