Nam nam [https://community.jboss.org/people/nambs] created the discussion "Re: JBoss/JVM process RAM usage increasing steadily" To view the discussion, visit: https://community.jboss.org/message/723403#723403 -------------------------------------------------------------- We have tried to replicate this issue on Test bed with Heap size set to 1GB. On test bed as soon as JBoss is started we find that there are a lot of threads (JBoss System Thread(1) - around 300 threads) that are created. I have no idea what these threads are for, any information on this will be helpful. This is even before any request is made to the servers. But this is not observer on Production. Thread count is tabulated below. Though number of threads has decreased the RSS value is increasing.  | Date | Time | Total Thread | Daemon Thread | Non-Daemon Thread | JBoss System Thread(1) | http Thread | VSZ | RSS | SZ | | | 2012-03-12 | 17:55:30 | 431 | 403 | 28 | 300 | 61 | 2343840 | 1028664 | 585960 | mapped: 1835679K writeable/private: 1803527K shared: 0K | | 2012-03-12 | 18:22:42 | 428 | 399 | 28 | 300 | 61 | 2409304 | 1500656 | 602326 | mapped: 1835679K writeable/private: 1803527K shared: 0K | | 2012-03-13 | 09:52:52 | 423 | 395 | 28 | 300 | 61 | 2409304 | 1501628 | 602326 | mapped: 1835679K writeable/private: 1803527K shared: 0K | -------------------------------------------------------------- Reply to this message by going to Community [https://community.jboss.org/message/723403#723403] Start a new discussion in Performance Tuning at Community [https://community.jboss.org/choose-container!input.jspa?contentType=1&...]

Nam nam [https://community.jboss.org/people/nambs] created the discussion "Re: JBoss/JVM process RAM usage increasing steadily" To view the discussion, visit: https://community.jboss.org/message/723707#723707 -------------------------------------------------------------- Values mentioned in the above post were of server where Heap size was configured as 1GB. Below are values from the server where Heap is configured to 2GB but RSS=5.5GB and this keeps increasing till it uses up the entire RAM available. Also the thread count is almost constant for over 24hrs but RSS value is increasing. | Date | Time | Total threads | Daemon threads | Non daemon threads | ‘JBoss System threads’ | HTTP threads | VSZ | RSS | SZ | mapped: writeable/private: shared: | | 2012/3/13 | 11:50:48 | 277 | 245 | 32 | 2 | 208 | 3644988 | 3026036 | 911247 | mapped: 3653180K writeable/private: 3403160K shared: 3272K | | 2012/3/13 | 14:32:03 | 276 | 244 | 32 | 2 | 208 | 3817224 | 3186660 | 954306 | mapped: 3825416K writeable/private: 3545084K shared: 3272K | | 2012/3/13 | 18:00:03 | 276 | 244 | 32 | 2 | 208 | 4175848 | 3614728 | 1043962 | mapped: 4184040K writeable/private: 3950492K shared: 3272K | | 2012/3/14 | 00:00:03 | 276 | 244 | 32 | 2 | 208 | 4696012 | 4165484 | 1174003 | mapped: 4704204K writeable/private: 4480168K shared: 3272K | | 2012/3/14 | 06:00:03 | 276 | 244 | 32 | 2 | 208 | 5168076 | 4573556 | 1292019 | mapped: 5176268K writeable/private: 4884224K shared: 3272K | | 2012/3/14 | 12:00:04 | 276 | 244 | 32 | 2 | 208 | 5953416 | 5349432 | 1488354 | mapped: 5961608K writeable/private: 5643848K shared: 3272K | | 2012/3/14 | 15:00:03 | 276 | 244 | 32 | 2 | 208 | 6349600 | 5778032 | 1587400 | mapped: 6357792K writeable/private: 6077580K shared: 3272K |  -------------------------------------------------------------- Reply to this message by going to Community [https://community.jboss.org/message/723707#723707] Start a new discussion in Performance Tuning at Community [https://community.jboss.org/choose-container!input.jspa?contentType=1&...]