Hi Solr Users, We are in the process of upgrading from Solr 1.3 to Solr 1.4.1. While performing stress test on Solr 1.4.1 to measure the performance improvement in Query times (QTime) and no more blocked threads, we ran into memory issues with Solr 1.4.1.
Test Setup details: - 2 identical hosts running Solr 1.3 and Solr 1.4.1 individually. - 3 cores with index sizes : 10 GB, 2 GB, 1 GB. - JVM Max RAM : 3GB ( Xmx3072m) , Total RAM : 4GB - No other application/service running on the servers. - For querying solr servers, we are using wget queries from a standalone host. For the same index data and same set of queries, Solr 1.3 is hovering between 1.5 to 2.2 GB, whereas with about 20K requests Solr 1.4.1 is reaching its 3 GB limit and performing FULL GC after almost every query. The Full GC is also not freeing up any memory. Has anyone also faced similar issues with Solr 1.4.1 ? Also why is Solr 1.4.1 using more memory for the same amount of processing compared to Solr 1.3 ? Is there any particular configuration that needs to be done to avoid this high memory usage ? Thanks, Rachita
