I'm running Mysql 3.23.52 on a Redhat 8.0 installation booting to Gnome. The machine is a dual AMD 1800, 1 gig of ram, one Ultra ATA IDE drive, and 2 18 gig scsi 10,000 RPM drives on a RAID controller running Raid 0.
I've got everything except /db on the IDE drive, /db is the only thing on the raid array. I've got a couple of smallish tables and one larger table with about 7 gigs of data. The larger table is a fixed row format table with each row being 462 bytes wide. I have a primary auto increment int column and a unique index on a varchar 60. Pack keys is off, delayed key writes on. With this kind of hardware I was expecting pretty good performance, but I haven't seen it yet. I finally decided something was wrong when I had to run an alter table on the 7 gig table, adding 3 columns, a varchar 12, a varchar 50, and a datetime columm.... and it took over 10 HOURS to complete. That seems way too slow to me... I've included relevant portions (the uncommented portions) from my.cnf, the OS installation was fairly vanilla, using defaults for just about everything. The file system is ext3. Any suggestions or things I haven't included that you need? Sorry if I'm doing something really stupid here... relatively new to Linux after a lot of years of windoze. Thanks in advance Mike ********** my.cnf ************* [mysqld] port = 3306 socket = /var/lib/mysql/mysql.sock datadir = /db/mysql skip-locking set-variable = key_buffer=500M set-variable = max_allowed_packet=2M set-variable = table_cache=512 set-variable = sort_buffer=22M set-variable = record_buffer=22M set-variable = thread_cache=8 # Try number of CPU's*2 for thread_concurrency set-variable = thread_concurrency=6 set-variable = myisam_sort_buffer_size=64M log-bin server-id = 0 tmpdir = /tmp/ [mysqldump] quick set-variable = max_allowed_packet=16M [mysql] no-auto-rehash # Remove the next comment character if you are not familiar with SQL #safe-updates [isamchk] set-variable = key_buffer=500M set-variable = sort_buffer=8M set-variable = read_buffer=10M set-variable = write_buffer=30M [myisamchk] set-variable = key_buffer=500M set-variable = sort_buffer=8M set-variable = read_buffer=10M set-variable = write_buffer=30M [mysqlhotcopy] interactive-timeout --------------------------------------------------------------------- Before posting, please check: http://www.mysql.com/manual.php (the manual) http://lists.mysql.com/ (the list archive) To request this thread, e-mail <[EMAIL PROTECTED]> To unsubscribe, e-mail <[EMAIL PROTECTED]> Trouble unsubscribing? Try: http://lists.mysql.com/php/unsubscribe.php
