I have been offering free database hosting for over 4 years and I've
been doing it on a shoestring. My last MySQL server was a generic
1GHz system with 256MB RAM running Redhat 9. The performance was
surprisingly good because the query loads were not typically high. One
persistent problem was the initial connection times. On that old
system if I had less than approx 10,000 separate databases then the
connection times were "fast", and on the order of 1 second or so. If I
had more than 10,000 databases this dramatically changed the connection
times to well over 15 seconds or more.
I always attributed this connection lag to a problem with the filesystem
and the large number of directories. The old server had RH9 and ext3
with no htree support which I was told could help with this problem.
I recently bought a new 2.4 GHz system with 1GB of RAM and installed
Fedora 4 with ext3 and htree support. All new hardware, faster drives,
more RAM and updated software. I thought I was golden! Well, I have
14,000 databases on this new system and it is as slow as the old 1GHz
system.
The tuning articles I've read, and the sample my-*.cnf files that ship
with the tarball appear to apply to the more typical installation of a
single huge database rather than thousands of individual dbs. Can
anyone offer any suggestions?
Thanks,
Gary Huntress
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