Hi Shawn, Yes, I've increased the heap size to 4GB already, and I'm using a machine with 32GB RAM.
Is it recommended to further increase the heap size to like 8GB or 16GB? Regards, Edwin On 23 Aug 2015 10:23, "Shawn Heisey" <apa...@elyograg.org> wrote: > On 8/22/2015 7:31 PM, Zheng Lin Edwin Yeo wrote: > > I'm using Solr 5.2.1, and I've indexed about 1GB of data into Solr. > > > > However, I find that clustering is exceeding slow after I index this 1GB > of > > data. It took almost 30 seconds to return the cluster results when I set > it > > to cluster the top 1000 records, and still take more than 3 seconds when > I > > set it to cluster the top 100 records. > > > > Is this speed normal? Cos i understand Solr can index terabytes of data > > without having the performance impacted so much, but now the collection > is > > slowing down even with just 1GB of data. > > Have you increased the heap size? If you simply start Solr 5.x with the > included script and don't use any commandline options, Solr will only > have a 512MB heap. This is *extremely* small. A significant chunk of > that 512MB heap will be required just to start Jetty and Solr, so > there's not much memory left for manipulating the index data and serving > queries. Assuming you have at least 4GB of RAM, try adding "-m 2g" to > the start commandline. > > Thanks, > Shawn > >
