Just revisiting this topic, as it still plagues us today (CFMX 6.1). We're waiting for CF8 to upgrade.
No, we do not have any other processes running at the "stop the world" pauses, and the 2-4 minute delays occur randomly and at different times, approximately twice a day. Here's another strange symptom that seems to indicate something wacky is going on with memory: I tried using Pete Freitag's "memory monitoring" code: http://www.petefreitag.com/item/115.cfm Our server processes approx 30 templates/second. <cfset runtime = CreateObject("java","java.lang.Runtime").getRuntime()> <cfset freeMemory = runtime.freeMemory() / 1024 / 1024> Here's what the "Free Allocated Memory" statistic does, taken at 5 second intervals (Xmx of 800MB right now): 121 mb 421 mb 338 mb 42 mb 41 mb 443 mb 25 mb 390 mb 39 mb I'm amazed at how much "free allocated memory" is leaping about every 5 seconds. Is this at all normal? Or is there a major leak or something with Jrockit, Jrun, or our app? Regards, Terry Nicholas M Tunney <[EMAIL PROTECTED]> wrote: 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 > > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~| ColdFusion MX7 by Adobe® Dyncamically transform webcontent into Adobe PDF with new ColdFusion MX7. Free Trial. http://www.adobe.com/products/coldfusion?sdid=RVJV Archive: http://www.houseoffusion.com/groups/CF-Linux/message.cfm/messageid:4319 Subscription: http://www.houseoffusion.com/groups/CF-Linux/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=11502.10531.14
