set-variable = query_cache_type=1 set-variable = query_cache_size=1024M set-variable = net_buffer_length=32760 set-variable = bulk_insert_buffer_size=32M set-variable = key_buffer=1024M set-variable = join_buffer_size=128M set-variable = max_allowed_packet=8M set-variable = table_cache=1024 set-variable = myisam_sort_buffer_size=1024M
set-variable = thread_concurrency=16 set-variable = thread_cache_size=16 set-variable = sort_buffer=8M set-variable = read_rnd_buffer_size=8M set-variable = record_buffer=8M
If you're using only MyISAM tables for your data, then key_buffer should generally have as much RAM as it can have (up to the point where it makes sense, i.e., only has much RAM as is needed to store your index data). myisam_sort_buffer_size ought to be about 1/4 of your RAM.
If you're using InnoDB as well, or if you use InnoDB tables only, then you should give innodb_buffer_pool_size a good portion of your RAM, and perhaps 16-32MB or so for innodb_additional_mem_pool_size.
- Gabriel
On Friday, November 7, 2003, at 06:32 PM, Jan Pieter Kunst wrote:
At 13:21 -0500 07-11-2003, Gabriel Ricard wrote:
[1.8 GHz G5:]
select: Total time: 1428 wallclock secs (67.50 usr 25.18 sys + 0.00 cusr 0.00 csys = 92.68 CPU)
[dual 2.0 GHz G5:]
select: Total time: 146 wallclock secs (42.52 usr 33.74 sys + 0.00 cusr 0.00 csys = 76.26 CPU)
How the select portion of the test could be 10x slower, I'm not sure. Have you tuned MySQL at all? key_buffer, etc?
Well, I'm looking for advice on how I should tune MySQL. These are the relevant parts of the my.cnf I used:
[mysqld] skip-locking set-variable = key_buffer=64M set-variable = max_allowed_packet=1M set-variable = table_cache=256 set-variable = sort_buffer=4M set-variable = net_buffer_length=8K set-variable = record_buffer=1M set-variable = thread_cache=8 set-variable = myisam_sort_buffer_size=8M log-bin server-id = 1
[mysqldump] quick set-variable = max_allowed_packet=16M
[mysql] no-auto-rehash
[isamchk] set-variable = key_buffer=20M set-variable = sort_buffer=20M set-variable = read_buffer=2M set-variable = write_buffer=2M
[myisamchk] set-variable = key_buffer=20M set-variable = sort_buffer=20M set-variable = read_buffer=2M set-variable = write_buffer=2M
If you have any advice on what I could change here to get faster selects, I'm all ears.
Thanks in advance, Jan Pieter Kunst
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