Do you have any backup processes running during this time period? Nic
Terry Ford wrote: > We are running CFMX 6.1 on linux RHEL4. > > Approximately once every 8-12 hours or so our server stops responding for > about 3 minutes. Symptoms: CF stops processing requests, stops queueing, > stops timing out requests, stops doing everything. > > We are using Jrockit 1.4.2 right now, but it also happens under Sun's JVM too. > > cfstat 1: > > 0 11 0 23 -1 -1 127 15 1 137 247 0 0 0 > 0 11 0 23 -1 -1 127 15 1 137 247 0 0 0 > 0 11 0 23 -1 -1 127 15 1 137 247 0 0 0 > 0 11 0 23 -1 -1 127 15 1 137 247 0 0 0 > 0 11 0 23 -1 -1 127 15 1 137 247 0 0 0 > ... etc.. for 3 minutes. > > Then it jumps back to life again, taking off as if nothing ever happened. > > I thought perhaps it was a problem with garbage collection, but Jrockit's GC > debugging looks fine. In fact, it continues to garbage collect during that 3 > minutes, just as it did before the freeze: > > [gcpause][Thu Nov 9 16:00:07 2006][13912] old collection phase 0-2 pause > time: 7.998000 ms, (start time: 21226.183 s) > [gcpause][Thu Nov 9 16:00:07 2006][13912] total mark time: 530.209 ms > [gcpause][Thu Nov 9 16:00:07 2006][13912] total sweep time: 5.027 ms > [gcpause][Thu Nov 9 16:00:07 2006][13912] old collection phase 4-0 pause > time: 27.229000 ms, (start time: 21226.692 s) > [gcpause][Thu Nov 9 16:00:07 2006][13912] (pause includes compaction: 0.000 > ms (no compaction), update ref: 0.000 ms) > [gcpause][Thu Nov 9 16:01:07 2006][13912] old collection phase 0-2 pause > time: 10.371000 ms, (start time: 21286.774 s) > [gcpause][Thu Nov 9 16:01:08 2006][13912] total mark time: 452.252 ms > [gcpause][Thu Nov 9 16:01:08 2006][13912] total sweep time: 39.125 ms > [gcpause][Thu Nov 9 16:01:08 2006][13912] old collection phase 4-0 pause > time: 62.351000 ms, (start time: 21287.204 s) > [gcpause][Thu Nov 9 16:01:08 2006][13912] (pause includes compaction: 30.253 > ms (external), update ref: 4.000 ms) > [gcpause][Thu Nov 9 16:02:08 2006][13912] old collection phase 0-2 pause > time: 15.459000 ms, (start time: 21347.301 s) > [gcpause][Thu Nov 9 16:02:09 2006][13912] total mark time: 581.907 ms > [gcpause][Thu Nov 9 16:02:09 2006][13912] total sweep time: 147.318 ms > [gcpause][Thu Nov 9 16:02:09 2006][13912] old collection phase 4-0 pause > time: 181.771000 ms, (start time: 21347.849 s) > [gcpause][Thu Nov 9 16:02:09 2006][13912] (pause includes compaction: > 131.157 ms (internal), update ref: 16.001 ms) > [gcpause][Thu Nov 9 16:03:09 2006][13912] old collection phase 0-2 pause > time: 16.870000 ms, (start time: 21408.057 s) > > So the JVM appears to be fine. The problem is not with the database -- there > are no outstanding queries when this occurs. The network connection is fine. > The disk is fine. There's a ton of memory. There's no paging going on. > > So... does anyone have any idea what might be causing these infrequent yet > long pauses? > > Regards, > Terry > > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~| Introducing the Fusion Authority Quarterly Update. 80 pages of hard-hitting, up-to-date ColdFusion information by your peers, delivered to your door four times a year. http://www.fusionauthority.com/quarterly Archive: http://www.houseoffusion.com/groups/CF-Linux/message.cfm/messageid:4223 Subscription: http://www.houseoffusion.com/groups/CF-Linux/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=11502.10531.14
