最近突然出现：网站运行30-40分钟就需要重启一次MYsql服务，网站才能正常访问,求解决方法！！

Question

最近突然出现：网站运行30-40分钟就需要重启一次MYsql服务，网站才能正常访问,求解决方法！！
服务器配置：CPU*4 内存 4 G

windows 2008 ymsql版本：5.5.48
重启后的 mysqld.exe 任务管理器中的工作设置（内存）为171136K 进程数为28 ，运行40分钟左右，工作设置（内存）为216898K，进程数为123 网站此时已无法访问，需要重启mysql服务后才能恢复正常。

Answer 1

以下是我目前的My.ini文件配置：

Example MySQL config file for very large systems.

#

This is for a large system with memory of 1G-2G where the system runs mainly

MySQL.

#

MySQL programs look for option files in a set of

locations which depend on the deployment platform.

You can copy this option file to one of those

locations. For information about these locations, see:

http://dev.mysql.com/doc/mysql/en/option-files.html

#

In this file, you can use all long options that a program supports.

If you want to know which options a program supports, run the program

with the "--help" option.

The following options will be passed to all MySQL clients

[client]
#password = your_password
port = 3306
socket = /tmp/mysql.sock

Here follows entries for some specific programs

The MySQL server

[mysqld]
port = 3306
socket = /tmp/mysql.sock
skip-external-locking
key_buffer_size = 512M
max_allowed_packet = 2M
table_open_cache = 512
sort_buffer_size = 32M
read_buffer_size = 32M
read_rnd_buffer_size = 8M
myisam_sort_buffer_size = 64M
thread_cache_size = 64
query_cache_size = 64M

Try number of CPU's*2 for thread_concurrency

thread_concurrency = 16
basedir= D:\SOFT_PHP_PACKAGE\mysql
datadir= D:\SOFT_PHP_PACKAGE\mysql\data
max_connections = 1000

Don't listen on a TCP/IP port at all. This can be a security enhancement,

if all processes that need to connect to mysqld run on the same host.

All interaction with mysqld must be made via Unix sockets or named pipes.

Note that using this option without enabling named pipes on Windows

(via the "enable-named-pipe" option) will render mysqld useless!

#skip-networking

Replication Master Server (default)

binary logging is required for replication

#log-bin=mysql-bin

required unique id between 1 and 2^32 - 1

defaults to 1 if master-host is not set

but will not function as a master if omitted

server-id = 1

Replication Slave (comment out master section to use this)

#

To configure this host as a replication slave, you can choose between

two methods :

#

1) Use the CHANGE MASTER TO command (fully described in our manual) -

the syntax is:

#

CHANGE MASTER TO MASTER_HOST=, MASTER_PORT=,

MASTER_USER=, MASTER_PASSWORD= ;

#

where you replace , , by quoted strings and

by the master's port number (3306 by default).

#

Example:

#

CHANGE MASTER TO MASTER_HOST='125.564.12.1', MASTER_PORT=3306,

MASTER_USER='joe', MASTER_PASSWORD='secret';

#

OR

#

2) Set the variables below. However, in case you choose this method, then

start replication for the first time (even unsuccessfully, for example

if you mistyped the password in master-password and the slave fails to

connect), the slave will create a master.info file, and any later

change in this file to the variables' values below will be ignored and

overridden by the content of the master.info file, unless you shutdown

the slave server, delete master.info and restart the slaver server.

For that reason, you may want to leave the lines below untouched

(commented) and instead use CHANGE MASTER TO (see above)

#

required unique id between 2 and 2^32 - 1

(and different from the master)

defaults to 2 if master-host is set

but will not function as a slave if omitted

#server-id = 2
#

The replication master for this slave - required

#master-host =
#

The username the slave will use for authentication when connecting

to the master - required

#master-user =
#

The password the slave will authenticate with when connecting to

the master - required

#master-password =
#

The port the master is listening on.

optional - defaults to 3306

#master-port =
#

binary logging - not required for slaves, but recommended

#log-bin=mysql-bin
#

binary logging format - mixed recommended

#binlog_format=mixed

Uncomment the following if you are using InnoDB tables

#innodb_data_home_dir = C:\mysql\data\
#innodb_data_file_path = ibdata1:2000M;ibdata2:10M:autoextend
#innodb_log_group_home_dir = C:\mysql\data\

You can set .._buffer_pool_size up to 50 - 80 %

of RAM but beware of setting memory usage too high

#innodb_buffer_pool_size = 384M
#innodb_additional_mem_pool_size = 20M

Set .._log_file_size to 25 % of buffer pool size

#innodb_log_file_size = 100M
#innodb_log_buffer_size = 8M
#innodb_flush_log_at_trx_commit = 1
#innodb_lock_wait_timeout = 50

[mysqldump]
quick
max_allowed_packet = 16M

[mysql]
no-auto-rehash

Remove the next comment character if you are not familiar with SQL

#safe-updates

[myisamchk]
key_buffer_size = 256M
sort_buffer_size = 256M
read_buffer = 2M
write_buffer = 2M

[mysqlhotcopy]
interactive-timeout

经过了一次调整为以下（但是问题还存在）

Example MySQL config file for very large systems.

#

This is for a large system with memory of 1G-2G where the system runs mainly

MySQL.

#

MySQL programs look for option files in a set of

locations which depend on the deployment platform.

You can copy this option file to one of those

locations. For information about these locations, see:

http://dev.mysql.com/doc/mysql/en/option-files.html

#

In this file, you can use all long options that a program supports.

If you want to know which options a program supports, run the program

with the "--help" option.

The following options will be passed to all MySQL clients

[client]
#password = your_password
port = 3306
socket = /tmp/mysql.sock

Here follows entries for some specific programs

The MySQL server

[mysqld]
port = 3306
socket = /tmp/mysql.sock
skip-external-locking
key_buffer_size = 1024M
max_allowed_packet = 4M
table_open_cache = 1024
sort_buffer_size = 64M
read_buffer_size = 64M
read_rnd_buffer_size = 16M
myisam_sort_buffer_size = 128M
thread_cache_size = 128
query_cache_size = 128M

Try number of CPU's*2 for thread_concurrency

thread_concurrency = 16
basedir= D:\SOFT_PHP_PACKAGE\mysql
datadir= D:\SOFT_PHP_PACKAGE\mysql\data
max_connections = 10000
#log
#long_query_time =2 --是指执行超过多久的sql会被log下来，这里是2秒
#log-slow-queries= /usr/local/mysql/log/slowquery.log --将查询返回较慢的语句进行记录
#log-queries-not-using-indexes = nouseindex.log --就是字面意思，log下来没有使用索引的query
#log=mylog.log --对所有执行语句进行记录
log-error="D:/SOFT_PHP_PACKAGE/mysql/logs/error.log"

#log="D:/SOFT_PHP_PACKAGE/mysql/logs/mysql.log"

long_query_time=5

log-slow-queries= "D:/SOFT_PHP_PACKAGE/mysql/logs/slowquery.log"

Don't listen on a TCP/IP port at all. This can be a security enhancement,

if all processes that need to connect to mysqld run on the same host.

All interaction with mysqld must be made via Unix sockets or named pipes.

Note that using this option without enabling named pipes on Windows

(via the "enable-named-pipe" option) will render mysqld useless!

#skip-networking

Replication Master Server (default)

binary logging is required for replication

#log-bin=mysql-bin

required unique id between 1 and 2^32 - 1

defaults to 1 if master-host is not set

but will not function as a master if omitted

server-id = 1

Replication Slave (comment out master section to use this)

#

To configure this host as a replication slave, you can choose between

two methods :

#

1) Use the CHANGE MASTER TO command (fully described in our manual) -

the syntax is:

#

CHANGE MASTER TO MASTER_HOST=, MASTER_PORT=,

MASTER_USER=, MASTER_PASSWORD= ;

#

where you replace , , by quoted strings and

by the master's port number (3306 by default).

#

Example:

#

CHANGE MASTER TO MASTER_HOST='125.564.12.1', MASTER_PORT=3306,

MASTER_USER='joe', MASTER_PASSWORD='secret';

#

OR

#

2) Set the variables below. However, in case you choose this method, then

start replication for the first time (even unsuccessfully, for example

if you mistyped the password in master-password and the slave fails to

connect), the slave will create a master.info file, and any later

change in this file to the variables' values below will be ignored and

overridden by the content of the master.info file, unless you shutdown

the slave server, delete master.info and restart the slaver server.

For that reason, you may want to leave the lines below untouched

(commented) and instead use CHANGE MASTER TO (see above)

#

required unique id between 2 and 2^32 - 1

(and different from the master)

defaults to 2 if master-host is set

but will not function as a slave if omitted

#server-id = 2
#

The replication master for this slave - required

#master-host =
#

The username the slave will use for authentication when connecting

to the master - required

#master-user =
#

The password the slave will authenticate with when connecting to

the master - required

#master-password =
#

The port the master is listening on.

optional - defaults to 3306

#master-port =
#

binary logging - not required for slaves, but recommended

#log-bin=mysql-bin
#

binary logging format - mixed recommended

#binlog_format=mixed

Uncomment the following if you are using InnoDB tables

#innodb_data_home_dir = C:\mysql\data\
#innodb_data_file_path = ibdata1:2000M;ibdata2:10M:autoextend
#innodb_log_group_home_dir = C:\mysql\data\

You can set .._buffer_pool_size up to 50 - 80 %

of RAM but beware of setting memory usage too high

#innodb_buffer_pool_size = 384M
#innodb_additional_mem_pool_size = 20M

Set .._log_file_size to 25 % of buffer pool size

#innodb_log_file_size = 100M
#innodb_log_buffer_size = 8M
#innodb_flush_log_at_trx_commit = 1
#innodb_lock_wait_timeout = 50

[mysqldump]
quick
max_allowed_packet = 64M

[mysql]
no-auto-rehash

Remove the next comment character if you are not familiar with SQL

#safe-updates

[myisamchk]
key_buffer_size = 1024M
sort_buffer_size = 1024M
read_buffer = 16M
write_buffer = 16M

[mysqlhotcopy]
interactive-timeout