Have you increased MySQL's key_buffer_size, as described in FAQ? If not, this is a definitely a bottleneck in your case.

Also, please describe your hardware if you want your question to be answered ;)

Max Lytvyn wrote:
I have a big problem with search speed - queries that contain common
words are very slow. I have an index of 200,000 documents on one server; all files are plain
html with just title and body text, 3-40kb size. Searching with one word queries that return less than 1000 results are
very fast - about 0.1 sec or even faster. But if any word of a query
matches many urls (e.g. 'word' matches 58000 urls), the search takes
over 5 seconds (up to 25 secs, if several common words are used
together). I had the same problem with MnogoSearch, but in that case query time was
exponentially dependent on the number of results returned, and queries
with more keywords (and thus fewer urls returned) were faster. In
aspseek the situation is the same, but looks like the search time is
exponentially dependent on the sum of the url all keywords of the query
return, not on intersection.
Please HELP!!! I'm desperate - the server load reaches 87% - it is
critical.
Best Max




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