高手看看，我的MYSQL优化的是否正常！

[pyantking]

MYSQL数据库开了1天左右
有一次自动重启的迹象

是否还要设置些什么

Aborted_clients 298 
Aborted_connects 6122 
Binlog_cache_disk_use 0 
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Bytes_received 507 
Bytes_sent 8083 
Com_admin_commands 0 
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Com_create_function 0 
Com_create_index 0 
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Com_create_user 0 
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Com_delete_multi 0 
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Variable_name  Value  
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Compression OFF 
Connections 7752 
Created_tmp_disk_tables 0 
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Innodb_buffer_pool_pages_total 512 
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Key_read_requests 42304896 
Key_reads 132 
Key_write_requests 6363 
Key_writes 5790 
Last_query_cost 0.000000 
Max_used_connections 152 
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Open_streams 0 
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Qcache_hits 493631 
Qcache_inserts 89116 
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Qcache_queries_in_cache 9197 
Qcache_total_blocks 18436 
Questions 1096647 
Variable_name  Value  
Rpl_status NULL 
Select_full_join 0 
Select_full_range_join 0 
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Select_scan 7 
Slave_open_temp_tables 0 
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Table_locks_immediate 485973 
Table_locks_waited 288 
Tc_log_max_pages_used 0 
Tc_log_page_size 0 
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Threads_cached 1 
Threads_connected 151 
Threads_created 1371 
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Uptime 122429 
Uptime_since_flush_status 122429 

[pyantking]

080401 15:43:10 InnoDB: Starting shutdown...
080401 15:43:13 InnoDB: Shutdown completed; log sequence number 0 78336869
080401 15:43:13 [Note] /usr/local/libexec/mysqld: Shutdown complete

080401 15:43:13 mysqld ended

080401 15:43:14 mysqld started
080401 15:43:14 InnoDB: Started; log sequence number 0 78336869
080401 15:43:14 [Note] /usr/local/libexec/mysqld: ready for connections.
Version: '5.0.45' socket: '/tmp/mysql.sock' port: 3306 FreeBSD port: mysql-server-5.0.45_1
080401 20:55:42 [ERROR] /usr/local/libexec/mysqld: Out of memory (Needed 559240 bytes)
080401 20:55:43 [ERROR] /usr/local/libexec/mysqld: Out of memory (Needed 559240 bytes)
080403 21:00:38 InnoDB: Error: cannot allocate 278528 bytes of
InnoDB: memory with malloc! Total allocated memory
InnoDB: by InnoDB 18126288 bytes. Operating system errno: 12
InnoDB: Check if you should increase the swap file or
InnoDB: ulimits of your operating system.
InnoDB: On FreeBSD check you have compiled the OS with
InnoDB: a big enough maximum process size.
InnoDB: Note that in most 32-bit computers the process
InnoDB: memory space is limited to 2 GB or 4 GB.
InnoDB: We keep retrying the allocation for 60 seconds...
080403 21:00:39 [ERROR] /usr/local/libexec/mysqld: Out of memory (Needed 1531824 bytes)

以前数据表的内类是InnoDB现在我改成MyISAM了

[懒得去死]

贴错误日志

[pyantking]

自已顶起来

[pyantking]

高手那去了!

[懒得去死]

080401 20:55:42 [ERROR] /usr/local/libexec/mysqld: Out of memory (Needed 559240 bytes)
080401 20:55:43 [ERROR] /usr/local/libexec/mysqld: Out of memory (Needed 559240 bytes)


检查你的有关buffer的设置。
不行的话贴出来看看。

[ckc]

内存不够
加大内存或者加大交换空间或者调小mysql的内存需要
如果mysql是你自己编译的或者用了测试版本什么的，调整下系统吧

[pyantking]

谢谢5,6楼的关注

[mysqld]
back_log=384
innodb_additional_mem_pool_size=16M  
innodb_flush_log_at_trx_commit=0
innodb_log_buffer_size=8M         
innodb_thread_concurrency=8 
key_buffer_size=256M
max_allowed_packet=4M
thread_stack=256K
table_cache=128K
sort_buffer_size=6M
read_buffer_size=4M
join_buffer_size=8M
read_rnd_buffer_size=32M 
myisam_sort_buffer_size=64M
table_cache=512
thread_cache_size=64
query_cache_size= 4M
tmp_table_size=256M
max_connections=3000
max_connect_errors=10000000

以上是my.cnf文件内容,不知道是不是设置的太小了!我觉得够大了!
OS:FreeBSD
MYSQL:mysql-server-5.0.45

[懒得去死]

降低
sort_buffer_size=6M
read_buffer_size=4M
join_buffer_size=8M
read_rnd_buffer_size=32M
几个的值。

[pyantking]

为什么,能给个理由吗?

[懒得去死]

Table_locks_waited 288
你这个值也是有点大，检察一下有没有执行时间很长的SQL语句。

[懒得去死]

这几个变量都是会话级的。

sort_buffer_size=6M
read_buffer_size=4M
join_buffer_size=8M
read_rnd_buffer_size=32M

如果你当前有100个连接的话，粗粗算一下

100*（6+4+8+32）+ 256+256=超过5G多了。

你的系统内存是多大？

[pyantking]

谢谢!内存是4G

[懒得去死]

我觉得还是调整你的SQL语句吧。

那三个耗费内存的都是在FULL TABLE SCAN时才用到的。

[CYH_0306]

路过