openwrt MySQL移植
1 选择包
选择两个包,拷贝配置文件 cp products/mt7621/config_6080 .config
编译固件
openwrt 百万数据的优化,
执行脚本: mysql -u root -p123456 wacs_db </etc/config/audit_test_mysql.sql #show variables like '%timeout%'; SHOW GLOBAL VARIABLES LIKE 'max_allowed_packet'; set global wait_timeout=60000; #set global max_allowed_packet = 400*1024*1024 # 远程登录 update user set Host='%' where User='liulin'; GRANT ALL PRIVILEGES ON *.* TO 'liulin'@'%' IDENTIFIED BY '123456' WITH GRANT OPTION; FLUSH PRIVILEGES; # 查询 show variables like 'event_scheduler'; 关闭event #数据达到百万级的时候count(*) 失效 select view_id from audit_view_ex_record order by view_id desc limit 1; select view_id from audit_view_ex_record limit 1; #数据库批量删除 delete from audit_view_ex_record where view_id <1230; #每6个月清空一次MySQL的审计表 #审计数据不参与备份, 数据太大,页面不提供选项 , 后台给个脚本 # 读取MySQL文件空间大小,这种更准确 /factory/database/mysql/wacs_db# du -s * | sort -nr #这种更直观, du -sh * | sort -nr # 首先判断 /factory/database/mysql/wacs_db的大小 # 设备存储空间的总大小的80% um # 如何判断一个设备是X86 呢 ? #建立索引,否则查询就会异常退出
ALTER TABLE `audit_view_record` ADD INDEX index_name_c ( `view_mac` );
mysql> ALTER TABLE `audit_view_record` ADD INDEX index_name_c ( `view_mac` );
Query OK, 0 rows affected (0.07 sec)
Records: 0 Duplicates: 0 Warnings: 0
#查询语句
SELECT * FROM audit_view_ex_record WHERE view_mac='2222' order by view_id desc LIMIT 0,10;
SELECT * FROM audit_view_record WHERE view_mac='00:26:2d:9d:17:47' order by view_id desc LIMIT 0,10;
select view_id from audit_view_ex_record order by view_id desc limit 1;
# 数据库只增不减问题
use information_schema;
select table_name,data_free,engine from information_schema.tables where table_schema='wacs_db';
show table status like 'audit_view_ex_record';
explain
delete
from
drp_pftzd
where
id
in
(
select
id
from
drp_pftzdbak) limit 1000\Gex
/dev/sda3 on /factory type ext4 (rw,relatime,data=ordered)
GRANT ALL PRIVILEGES ON *.* TO liulin@"%" IDENTIFIED BY "123456" WITH GRANT OPTION; 授权文件, 这样可以远程访问
FLUSH PRIVILEGES;