Ideally we could get good approximates for all of them, including any of our custom caches (of which we have about five). The RAM size estimator spreadsheet [1] is helpful but we'd love to get accurate live size metrics.
[1] https://github.com/apache/lucene-solr/blob/trunk/dev-tools/size-estimator-lucene-solr.xls On Mon, Apr 14, 2014 at 10:56 PM, Erick Erickson <erickerick...@gmail.com>wrote: > _which_ solrCache objects? filterCache? result cache? documentcache? > > result cache is about "average size of a query" + "window size * > sizeof int) for each entry. > filter cache is about "average size of a filter query" + maxdoc/8 > document cacha is about "average size of the stored fields in bytes" * > size. > > HTH, > Erick > > On Mon, Apr 14, 2014 at 5:17 PM, Gregg Donovan <gregg...@gmail.com> wrote: > > We'd like to graph the approximate RAM size of our SolrCache instances. > Our > > first attempt at doing this was to use the Lucene RamUsageEstimator [1]. > > > > Unfortunately, this appears to give a bogus result. Every instance of > > FastLRUCache was judged to have the same exact size, down to the byte. I > > assume this is due to an issue with how the variably-sized backing maps > > were calculated, but I'm not sure. > > > > Any ideas for how to get an accurate RAM estimation for SolrCache > objects? > > > > --Gregg > > > > [1] https://gist.github.com/greggdonovan/10682810 >
