Thanks for giving the file handle patch a try. I'm very glad that it's working for you. I wander if either one of you has any scripts / data to monitor performance of your Lucene instance. If so, I would be very curious to know if you have seen any performance impact of this patch. Even without scripts, have you noticed anything just informally?
From what I know, the patch in itself should have very little effect on performance. In fact, searching could be slightly slower or slightly faster, depending on the OS you are running on, the size of your index, the size of your RAM, and how that OS implements file caching. I'd like to know what kinds of things people are seeing in the real world with it. Certainly, if there is a slowdown, I'd like to know! This is mostly related to searching, but could apply to indexing as well. But for indexing, there is an exciting news: I believe that with this patch, the merge factor can be turned up quite a bit higher without running our of file handles. This probably means that the indexing rate can go up by a factor of two or more!
Thanks.very much Dmitry.
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