On 5/10/2013 2:00 AM, heaven wrote: > UPD: > Forget to confirm, we're using Solr 4.2.1 and will wait for Solr 4.3.1 or > for 4.4 as you advised.
Solr 4.2.1 should be pretty stable. You mentioned on the previous message that your server load is below 16. This is very high. What is your CPU utilization, and most importantly, what is your iowait percentage? If you are looking at top, this is the "%wa" value. Some other things to check: - How big are your indexes? Your server is hosting six of them - three collections, each with two shards. Each instance of Solr has a max heap of 4GB. The OS and zookeeper probably use up another 1GB or so. If nothing else is running on the server, then that means you have about 23GB of free memory left for caching. With that much free memory, you could probably handle 40GB of index with good performance, unless your query volume is very very high. If there are other programs running on the server, then your free memory will go down. - What kind of RAID are you using? If it's RAID5 or RAID6, then sustained write performance (indexing) will not be very good. With standard hard drives, RAID10 is best. You could take the plunge and get SSD instead, if there's enough money in the budget for it. Comparing your server load with mine: My production Solr servers have 8 CPU cores and the load average is rarely above 1.5 even during busy times. Overall CPU utilization normally peaks at about 15 percent. Thanks, Shawn
