Alejandro Guizar [http://community.jboss.org/people/alex.guizar%40jboss.com] created the discussion
"Re: JBPM 3.2.5,MSSQL 2005 - blocking in JBPM_JOB table" To view the discussion, visit: http://community.jboss.org/message/560975#560975 -------------------------------------------------------------- > Is it safe to to set transaction isolation level to READ_UNCOMMITTED? No, it is not. HSQLDB supports read-uncommitted isolation only and jBPM exhibits erratic behavior in concurrent processes, particularly in process variables and join nodes. Apart from HSQLDB, jBPM is http://hudson.jboss.org/hudson/view/jBPM/job/jbpm3-db/ continuously tested with READ_COMMITTED isolation. > Is there another, safer solution to this problem? Yes. Try a https://repository.jboss.org/nexus/content/groups/public/org/jbpm/jbpm3/jbpm-distribution/3.2.9/ newer jBPM version. At least https://jira.jboss.org/browse/JBPM-2790 one fix has gone towards improving job execution. > Looks like the issue is with having a lot jobs that execute quickly, which > results in a lot of inserts and deletes, which then results in a lot of > updates to the indexes. Having removed all the indexes in the jbpm_job > table has greatly reduced blocking issues, but not eliminated them. Is there > anyway to configure jbpm not to delete jobs, but just mark them as complete? No, but it would make a fine addition. At some point I thought of a configuration switch to delete process instances once they finished, to avoid filling up the database. Along with a switch to +not+ delete jobs and a procedure to clean up old jobs and, optionally, process instances, jBPM would have a complete cleaning solution. -------------------------------------------------------------- Reply to this message by going to Community [http://community.jboss.org/message/560975#560975] Start a new discussion in jBPM at Community [http://community.jboss.org/choose-container!input.jspa?contentType=1&containerType=14&container=2034]
_______________________________________________ jboss-user mailing list jboss-user@lists.jboss.org https://lists.jboss.org/mailman/listinfo/jboss-user
