On Mon, Nov 2, 2009 at 2:21 PM, bharath venkatesh
<bharathv6.proj...@gmail.com> wrote:
> we observed many times there is huge mismatch between qtime and
> time measured at the client for the response
Long times to stream back the result to the client could be due to
- client not reading fast enough
- network congestion
- reading the stored fields takes a long time
- this can happen with really big indexes that can't all fit in
memory, and stored fields tend to not be cached well by the OS
(essentially random access patterns over a huge area). This ends up
causing a disk seek per document being
streamed back.
- locking contention for reading the index (under Solr 1.3, but not
under 1.4 on non-windows platforms)
I didn't see where you said what Solr version you were using. There
are some pretty big concurrency differences between 1.3 and 1.4 too
(if your tests involve many concurrent requests).
-Yonik
http://www.lucidimagination.com
