Hi Walter; Firstly thank for your detailed reply. I know that this is not a well detailed question but I don't have any metrics yet. If we talk about your system, what is the average RAM size of your Solr machines? Maybe that can help me to make a comparison.
2013/4/10 Walter Underwood <wun...@wunderwood.org> > On Apr 9, 2013, at 3:06 PM, Furkan KAMACI wrote: > > > Are there anybody who can help me about how to guess the approximately > > needed RAM for 5000 query/second at a Solr machine? > > No. > > That depends on the kind of queries you have, the size and content of the > index, the required response time, how frequently the index is updated, and > many more factors. So anyone who can guess that is wrong. > > You can only find that out by running your own benchmarks with your own > queries against your own index. > > In our system, we can meet our response time requirements at a rate of > 4000 queries/minute. We have several cores, but most traffic goes to a 3M > document index. This index is small documents, mostly titles and authors of > books. We have no wildcard queries and less than 5% of our queries use > fuzzy matching. We update once per day and have cache hit rates of around > 30%. > > We run new benchmarks twice each year, before our busy seasons. We use the > current index and configuration and the queries from the busiest day of the > previous season. > > Our key benchmark is the 95th percentile response time, but we also > measure median, 90th, and 99th percentile. > > We are currently on Solr 3.3 with some customizations. We're working on > transitioning to Solr 4. > > wunder > -- > Walter Underwood > wun...@wunderwood.org > > > >
