Here is my favorite: jstat -gc <pid> 10000 3000
Attaches to a local Java process and prints all minor and major GC's. Usually more detailed than VisualVM. Andrus --------------- Andrus Adamchik @andrus_a | @ApacheCayenne > On Jan 24, 2016, at 10:19 PM, Maik Musall <m...@selbstdenker.ag> wrote: > > Hi, > > yes, I tried, but the documented log output would never appear anywhere in my > logs. These are the options I'm using: > > -verbose:gc > -XX:+PrintGCDetails > -XX:+PrintGCDateStamps > > Despite these settings, I can't see ANYTHING in the logs about GC. I don't > know what I'm doing wrong there? > > Maik > >> Am 24.01.2016 um 13:27 schrieb Bogdan Zlatanov <bogdan.zlata...@gmail.com>: >> >> Hi, >> >> Have you tried tracing the garbage collection -> >> https://docs.oracle.com/cd/E19159-01/819-3681/abeig/index.html? >> >> Cheers, >> Bogdan >> >>> On 24/01/2016 13:01, Musall Maik wrote: >>> Hi, >>> >>> I have an application that often becomes laggy and shows slow responses >>> almost every day around 5 pm. The instance has daily scheduled restarts at >>> 5 am, so it occurs after 12 hours of use. When I restart it preemptively at >>> 3 pm, the problem does not occur. When I don't, users suffer bad response >>> times on many requests, but not all. >>> >>> Users are computing heavy statistics in this application, instance size >>> (mostly snapshot cache) at that time is usually about 50 GByte, while Xmx >>> is 84 GByte, and XX:MaxPermSize is 1024m. The biggest instance size I've >>> seen so far in production is 61 GByte, so 50 seems not like a limit where >>> something weird happens. >>> >>> CPU, memory, filesystem, database and network all show nothing special >>> before and after 5 pm. I monitored the instance with jvisualvm to no avail. >>> I've been searching for the reason for quite some time now, so I'd >>> appreciate any suggestion you might have what else to check. >>> >>> Thanks >>> Maik _______________________________________________ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list (Webobjects-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/webobjects-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
