Hello, I'm testing solr-4.0-alpha compared to 1.4. My index is optimized to one segment. I've seen a decrease in memory usage but a very high increase in CPU. This high cpu usage ends up giving me slower response times with 4.0 than 1.4 The server I'm using: Linux version 2.6.30-2-amd64 16 2.26GHz Intel Pentium Xeon Processors, 8GB RAM I have a jmeter sending queries using between 1 and 4 threads. The queries doesn't use faceting, neighter filters. Simple search to 5 text fields using dismax The index has 1M docs and is 1.2Gb size I've checked memory with jvmconsole and it's not GC fault. The index is built using the TieredMergePolicy for 4.0 and LogByteSizeMergePolicy for 1.4 but both were optimized to 1 segment (so in that case the merge policy shouldn't make any difference, am I correct?). I'm not indexing any docs while doing the tests Average response time came from 0.1sec to 0.3 sec
Here is a graph of the cpu increase: Any advice or something I should take into account? With the same resources solr-4.0 is being 3 times slower than 1.4 and I don't know what I'm doing wrong http://lucene.472066.n3.nabble.com/file/n3993187/ganglia-solr.png -- View this message in context: http://lucene.472066.n3.nabble.com/solr-4-0-and-high-cpu-usage-tp3993187.html Sent from the Solr - User mailing list archive at Nabble.com.
