FileManager does several explicit System.gc(); calls which does a stop-the-world garbage collect halting all threads on the entire system ----------------------------------------------------------------------------------------------------------------------------------------- Key: JBRULES-3313 URL: https://issues.jboss.org/browse/JBRULES-3313 Project: Drools Issue Type: Bug Security Level: Public (Everyone can see) Reporter: Geoffrey De Smet Assignee: Mark Proctor Priority: Critical Performance tuning presentations state that System.gc() is bad as it stops all threads in the JVM for a long garbage collect, which kills the load a server can handle. FileManager does it on 2 lines: {code} while ( !file.delete() && count++ < 5 ) { System.gc(); ... } {code} Findbugs notices it too. -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.jboss.org/secure/ContactAdministrators!default.jspa For more information on JIRA, see: http://www.atlassian.com/software/jira