Hi, 

I wish to tune our MySQL Server Parameter to increase
the speed of Join. I was trying to do a simple join
with two tables. One is big (~2,500,000 records); the
other one is small. The current join seems to take
forever to finish even on the indexed attribute.

I am trying to learn from 
http://www.mysql.com/doc/en/Server_parameters.html but
not confident enough to play with our server yet. Any
advice will be much appreciated. I am running
mysql3.23.49 on linux7.3 with 4 GB memory. So I want
to try the following from that doc:

shell> safe_mysqld -O key_buffer=64M -O
table_cache=256 -O sort_buffer=4M -O
read_buffer_size=1M &

My questions: if I run the above command (as root),
should I run it every time when the server starts? If
so, how can I set the above option automatically when
server starts. Thanks!

Qunfeng Dong



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