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
