mysql 2013错误--求 解决办法

arc0

配置：
Red Hat Enterprise Linux AS release 4 (Nahant Update 4)  Kernel \r on an \m

内存：4G

mysql版本：mysql  Ver 14.7 Distrib 4.1.20, for redhat-linux-gnu (i386) using readline 4.3


配置文件如下：

[client]
port    = 3306
socket  =   /data/mysql/mysql.sock

#[mysql_cluster]
#ndb-connectstring=192.168.1.2

[mysqld]
#ndbcluster
#ndb-connectstring=192.168.1.2

basedir=/usr/local/mysql
datadir=/data/mysql
socket =/data/mysql/mysql.sock
pid-file=/data/mysql/ydon.cn.pid
lower_case_table_names=0
port            = 3306

skip-locking
skip-name-resolve

key_buffer = 512M
max_allowed_packet = 64M
table_cache = 400
sort_buffer_size = 4M
read_buffer_size = 4M
read_rnd_buffer_size = 8M
myisam_sort_buffer_size = 64M
thread_cache_size = 8
query_cache_size = 32M
# Try number of CPU's*2 for thread_concurrency
thread_concurrency = 16
max_connections = 200
back_log = 50

#replication setting
log-bin = /data/binlog/
expire_logs_days = 3
server-id=6
max_binlog_size=1000M

#enable event
event_scheduler = 0

# for innodb settings
innodb_file_per_table
#innodb_data_file_path=ibdata1:50M:autoextend
#
# Set buffer pool size to 50-80% of your computer's memory
innodb_buffer_pool_size=512M
innodb_additional_mem_pool_size=32M
#
# Set the log file size to about 25% of the buffer pool size
innodb_log_file_size=128M
innodb_log_buffer_size=25M
innodb_flush_log_at_trx_commit=1
innodb_thread_concurrency=20

[mysql.server]
user=mysql
basedir=/usr/local/mysql
datadir=/data/mysql
socket  =/data/mysql/mysql.sock
pid-file=/data/mysql/ydon.cn.pid

[mysqldump]
quick
max_allowed_packet = 16M

[safe_mysqld]
basedir=/usr/local/mysql
datadir=/data/mysql
socket  =  /data/mysql/mysql.sock
pid-file=/data/mysql/ydon.cn.pid
err-log=/var/log/mysqld.log

主要症状：通过ssh连接主机后无法登陆mysql，显示2013错误。只有重启后大约10秒左右能连接数据库，以后就不能了。
谢谢高手给解决下。

arc0

什么时候有高手能来给看看啊

wildlily980

你说的重启是mysql 还是system?
http://hi.baidu.com/langwan/blog ... 89fa5accbf1a51.html

arc0

我的问题解决了：mysql没有对打开文件做出限制，不过系统对文件打开数做了限制，可以使用ulimit -a查看。具体的解决办法请查看这个连接，说明的比较详细。希望能帮助被这一问题困扰的朋友。
http://hi.baidu.com/langwan/blog ... 89fa5accbf1a51.html

http://hi.baidu.com/alexdjq/blog ... c08843d7887d0d.html

具体对连接数的计算等，可以参考下面这篇文章：

http://imysql.cn/2008_04_18_how_mysql_calculate_open_files

对上述3篇文件的链接没有通知作者，希望不会有意见。