正式環境問題分析指令碼

-- 1、查詢某列是否別索引引用

show index from t_loca where column_name like 'status'

-- 2、查一張表有哪些索引

show index from t_busi_task where key_name='status';

select count(id) from t_order;

-- 檢視表建立sql

show create table t_user;

-- 3、強制走某索引

select * from ***_log force index(ocode_oorder_id_ocomp_id)

-- 檢視連線該庫的ip

show processlist;

-- show full processlist;

select * from information_schema.processlist order by command;

-- 查詢所有事務的資訊，當表被鎖或查詢緩慢時使用

select * from information_schema.innodb_trx order by trx_started;

select count(1) from information_schema.innodb_trx;

kill 83467634;

-- 查詢所有程序

show processlist;

-- 主要包含了innodb事務鎖的具體情況，包括事務正在申**的鎖和事務加上的鎖。

select * from information_schema.innodb_locks;

-- 包含了blocked的事務的鎖等待的狀態

select * from information_schema.innodb_lock_waits;

select count(1) from t_busi_seq_task_detail;

select count(1) from t_busi_seq_task;

select * from information_schema.innodb_trx order by trx_started;

-- 顯示你資料庫中存在碎片的全部列表

select table_schema db, table_name, data_free/1024/1024 freemb, data_free, engine,table_rows,data_length+index_length length

from information_schema.tables where table_schema not in ('information_schema', 'mysql') and data_free > 0

order by data_free desc;

select table_schema db, sum(data_free/1024/1024/1024) free, engine,sum(data_length+index_length)/1024/1024/1024 total

, sum(data_length)/1024/1024/1024 datalenght, sum(index_length/1024/1024/1024) indexlenght

from information_schema.tables where table_schema not in ('information_schema', 'mysql') group by table_schema

select table_schema db, table_name, data_free, engine,table_rows,data_length+index_length length from information_schema.tables

where table_schema not in ('information_schema', 'mysql') and table_name in ('t_order_detail','t_order_extend','t_order')

order by data_free desc;

select * from t_order where rea

-- optimize table t_busi_seq_task_detail;

select count(1) from information_schema.tables

where table_schema not in ('information_schema', 'mysql') and data_free > 0;

-- 查詢碎片大於100m的表

select table_schema, table_name, data_free/1024/1024 as data_free_mb from information_schema.tables where engine like 'innodb' and data_free > 10*1024*1024;

-- 查詢所有表資料占用記憶體總和

select concat(round(sum(data_length/1024/1024),2),'mb') as data from information_schema.tables where table_schema='wllinked_standard';

select concat(round(sum(data_length),2),'byte') as data

from information_schema.tables where table_schema='wllinked_standard';

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