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From Ensdorf Ken <>
Subject RE: Question about index sizes.
Date Tue, 23 Jun 2009 18:59:25 GMT
That's a great question.  And the answer is, of course, it depends.  Mostly on the size of
the documents you are indexing.  50 million rows from a database table with a handful of columns
is very different from 50 million web pages,  pdf documents, books, etc.

We currently have about 50 million documents split across 2 servers with reasonable performance
- sub-second response time in most cases.  The total size of the 2 indices is about 300G.
 I'd say most of the size is from stored fields, though we index just about everything.  This
is on 64-bit ubuntu boxes with 32G of memory.  We haven't pushed this into production yet,
but initial load-testing results look promising.

Hope this helps!

> -----Original Message-----
> From: Jim Adams []
> Sent: Tuesday, June 23, 2009 1:24 PM
> To:
> Subject: Question about index sizes.
> Can anyone give me a rule of thumb for knowing when you need to go to
> multicore or shards?  How many records can be in an index before it
> breaks
> down?  Does it break down?  Is it 10 million? 20 million?  50 million?
> Thanks, Jim

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