mysql优化配置
tmp_table_size 设置大小500mb
key_buffer_size =384m//key_buffer_size指定用于索引的缓冲区大小，增加它可得到更
好的索引处理性能。 对于内存在4GB左右的服务器该参数可设置为256M或384M。注意
：该参数值设置的过大反而会是服务器整体效率降低！
sort_buffer_size = 17mb //排序缓存
read_buffer_size=4m //读取缓存
table_cache=256 //
ft_min_word_len //全文搜索
query_cache_size 查询缓存
<?
#!/bin/sh
#written by cuiyang 20081118
#######检查mysql状态
PORT=`netstat -na | grep "LISTEN" | grep "3306" | awk '{print $4}' | awk -F. '{print $2}'`
if [ "$PORT" -eq "3306" ]
then
#######检查mysql占CPU负载
mysql_cpu=`top -U root -b -n 1 | grep mysql | awk '{print $10}'|awk -F. '{print $1}'`
##如果mysql cpu负载大于80，则重启mysql
if [ "$mysql_cpu" -ge "80" ]
then
ps xww |grep 'bin/mysqld_safe' |grep -v grep | awk '{print $1}' | xargs kill -9
ps xww |grep 'libexec/mysqld' |grep -v grep | awk '{print $1}' | xargs kill -9
sleep 5
/usr/local/mysql/bin/mysqld_safe --user=root > /dev/null &
else
exit 0
fi
else
/usr/local/mysql/bin/mysqld_safe --user=root > /dev/null &
fi
?>
影响列数： 4999 (查询花费 0.1756 秒)
UPDATE `zgy_jobs_faces` SET postime = '1250784000' WHERE jid <505000 AND jid >500000
jobs_faces字段
字段 类型 整理 属性 Null 默认 额外 操作
jid int(10) UNSIGNED 否 auto_increment
oid int(10) UNSIGNED 否 0
cid mediumint(8) UNSIGNED 否 0
requests smallint(4) UNSIGNED 否 0
views mediumint(6) UNSIGNED 是 0
checked tinyint(1) UNSIGNED 否 0
istoped tinyint(1) UNSIGNED 否 0
postime int(10) UNSIGNED 否 0
losetime int(10) UNSIGNED 否 0
toped tinyint(1) UNSIGNED 否 0
toptime int(10) UNSIGNED 否 0
bold tinyint(1) UNSIGNED 否 0
highlight varchar(7) gbk_chinese_ci 否
lightime int(10) UNSIGNED 否 0
people smallint(4) UNSIGNED 否 0
sex tinyint(1) UNSIGNED 否 0
djobskinds varchar(30) gbk_chinese_ci 否
jname varchar(60) gbk_chinese_ci 否
影响列数： 4999 (查询花费 0.2393 秒)
UPDATE `zgy_jobs_fields` SET postime = '1250784000' WHERE jid <455000 AND jid >450000