nginx+mysql5 loadtesting configuration strangeness
- by genseric
i am trying to setup a new server running on debian6 and trying to make it work smooth under load. i ve used a wordpress site as a test object, and tried the configurations on http://blitz.io. when i increase the mysql max_connections from 50 to 200 lots of timeouts start to occur. but on 50 , no timeouts and pretty well response times. nginx configuration is fine , i tuned the config so i dont see errors. so i presume it's related to the other configuration options of my.cnf . i read some about options but still cant find what max_connections problem is all about. btw, the server has 16gb of ram and a fine i7 cpu.
here is the current my.cnf
[client]
port = 3306
socket = /var/run/mysqld/mysqld.sock
[mysqld_safe]
socket = /var/run/mysqld/mysqld.sock
nice = 0
[mysqld]
wait_timeout=60
connect_timeout=10
interactive_timeout=120
user = mysql
pid-file = /var/run/mysqld/mysqld.pid
socket = /var/run/mysqld/mysqld.sock
port = 3306
basedir = /usr
datadir = /var/lib/mysql
tmpdir = /tmp
language = /usr/share/mysql/english
skip-external-locking
bind-address = 127.0.0.1
key_buffer = 384M
max_allowed_packet = 16M
thread_stack = 192K
thread_cache_size = 20
myisam-recover = BACKUP
max_connections = 50
table_cache = 1024
thread_concurrency = 8
query_cache_limit = 2M
query_cache_size = 128M
expire_logs_days = 10
max_binlog_size = 100M
[mysqldump]
quick
quote-names
max_allowed_packet = 16M
[mysql]
#no-auto-rehash # faster start of mysql but no tab completition
[isamchk]
key_buffer = 16M
thanks in advance.
i asked this question on SO but it's closed as off topic so i believe this is a SF question.
