6.2 Stable + Mysql 5.0 poor performance

[Michael K. Smith - Adhost]

Hello Taseff:

> -----Original Message-----
> From: owner-freebsd-performance at freebsd.org [mailto:owner-freebsd-
> performance at freebsd.org] On Behalf Of ivo tasev
> Sent: Friday, May 11, 2007 2:02 AM
> To: freebsd-performance at freebsd.org
> Subject: 6.2 Stable + Mysql 5.0 poor performance
> 
> Hi all,
> i have machine with 2 x Quad Core Xeon cpu`s 2G ram and 4 3ware disks
> in
> raid10. There is 6.2 Stable on it and mysql 5.0 from the ports.
> 
> The mysql is installed with the following build options:
> WITH_XCHARSET=all WITH_OPENSSL=yes BUILD_OPTIMIZED=yes
WITH_ARCHIVE=yes
> WITH_FEDERATED=yes WITH_NDB=yes
> 
> I`m using libmap.conf with this in it:
> 
> [mysqld]
> libpthread.so.2         libthr.so.2
> 
> This is what I have in my.cnf :
> 
> set-variable = key_buffer=1024M
> set-variable = max_allowed_packet=64M
> set-variable = thread_stack=1024K
> set-variable = read_buffer_size=2M
> set-variable = read_buffer_size=2M
> 
> set-variable = max_connections=350
> set-variable = interactive_timeout=100
> set-variable = wait_timeout=120
> set-variable = max_user_connections=340
> 
> set-variable = query_cache_limit=1M
> set-variable = query_cache_size=32M
> set-variable = query_cache_type=1
> 
> set-variable = table_cache=1024
> set-variable = thread_cache=128
> set-variable = thread_cache_size=40
> set-variable = thread_concurrency=16
> 
> I`m performing the following test with super-smack:
> :~# time super-smack -d mysql
> /usr/local/share/super-smack/select-key.smack 10 10000
> 
> the results are:Query Barrel Report for client smacker1
> connect: max=1ms  min=0ms avg= 0ms from 10 clients
> Query_type      num_queries     max_time        min_time
q_per_s
> select_index    200000  0       0       18599.71
> 
> I can achieve better performance even on my colleague`s  notebook with
> 6.2 stable !?
> 
> I`ll be very thankful if someone can give me any ideas:)
> 
Here are some system tweaks that may help.

/etc/sysctl.conf

kern.threads.max_groups_per_proc=40000
kern.threads.max_threads_per_proc=40000
kern.maxfiles=65535
kern.maxfilesperproc=65535

/etc/libmap.conf

[mysqld]
libpthread.so.2 libthr.so.2
libpthread.so libthr.so

/boot/loader.conf

kern.maxdsiz="1073741824" # 1GB
kern.dfldsiz="1073741824" # 1GB
kern.maxssiz="134217728" # 128MB

Mike