Hi Shaun Please check the following: http://wiki.lib.sun.ac.za/index.php/SUNScholar/Prepare_Ubuntu#Step_7.6:_Setup_number_of_client_connections http://wiki.lib.sun.ac.za/index.php/SUNScholar/Prepare_Ubuntu#Step_9._Setup_the_environment_variables
Cheers hg On 16/02/2011 12:26, Shaun Donovan wrote: > Hi All. > > At UNISA uir.unisa.ac.za, we have upgraded from DSpace version 1.4.2 to > version 1.6.2. All looked well when we tested the system, but we have > been picking up a few issues since we have gone live. > > The first issue was that there was not enough perm-gen space for the > JVM. I rectified that by adding > > -Xmx4096M -Xms2048M -Dfile.encoding=UTF-8 -XX:+UseConcMarkSweepGC -XX: > +CMSPermGenSweepingEnabled -XX:+CMSClassUnloadingEnabled > -XX:MaxPermSize=512M > > to my startup script and using lambda probe, monitored the machine for > 16 days in which there were no problems. > > Then we started getting > java.util.NoSuchElementException: Timeout waiting for idle object > > Research showed that this was due to insufficient database connections. > I increased the db.maxconnections = 100 from the default 30 in > dspace.cfg. I used 100 as postgres default is also 100. I also increased > shared_buffers = 50000 and effective_cache_size = 100000 in > postgresql.conf as well as increasing postgres' maximum connections to > 200. > > The system seems to run pretty stable for a day, but then starts giving > these errors again. > > This specific error is not logged in catalina.out, but I get a lot of > Feb 16, 2011 9:42:44 AM org.apache.catalina.loader.WebappClassLoader > clearThreadLocalMap > SEVERE: The web application [] created a ThreadLocal with key of type > [java.lang.ThreadLocal] (value [java.lang.ThreadLocal@7d5f26a2]) and a > value of type [org.apache.cocoon.environment.internal.EnvironmentStack] > (value [[]]) but failed to remove it when the web application was > stopped. This is very likely to create a memory leak. > > These are continuously being logged. > > So my question is: > Are there any best practises for tuning postgres for DSpace, and how can > I get rid of the above error message? > > Many thanks. > > Shaun Donovan. > > > > > ------------------------------------------------------------------------------ > The ultimate all-in-one performance toolkit: Intel(R) Parallel Studio XE: > Pinpoint memory and threading errors before they happen. > Find and fix more than 250 security defects in the development cycle. > Locate bottlenecks in serial and parallel code that limit performance. > http://p.sf.net/sfu/intel-dev2devfeb > _______________________________________________ > DSpace-tech mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/dspace-tech -- Hilton Gibson Systems Administrator JS Gericke Library Room 1025D Stellenbosch University Private Bag X5036 Stellenbosch 7599 South Africa Tel: +27 21 808 4100 | Cell: +27 84 646 4758 ------------------------------------------------------------------------------ The ultimate all-in-one performance toolkit: Intel(R) Parallel Studio XE: Pinpoint memory and threading errors before they happen. Find and fix more than 250 security defects in the development cycle. Locate bottlenecks in serial and parallel code that limit performance. http://p.sf.net/sfu/intel-dev2devfeb _______________________________________________ DSpace-tech mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/dspace-tech
