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1708-huayu 2023-12-02 13:46:34 +08:00
parent 35d57e4c7c
commit fc99a64d28
3 changed files with 13 additions and 2 deletions
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4
.gitignore vendored Normal file
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@ -0,0 +1,4 @@
# Default ignored files
/shelf/
/.idea/workspace.xml
.idea

1
df/磁盘处理记录.md
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@ -34,4 +34,3 @@ mount
# 查看磁盘分区 # 查看磁盘分区
lsblk lsblk
``` ```

8
数据库/mysql/线程占用.md
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@ -7,8 +7,16 @@ information_schema这张数据表保存了MySQL服务器所有数据库的信息
3. `innodb_lock_waits` 锁等待的对应关系 3. `innodb_lock_waits` 锁等待的对应关系
```sql ```sql
-- 查看当前连接数
SHOW STATUS LIKE 'Threads_connected';
-- 查看系统设置连接数
SHOW VARIABLES LIKE 'max_connections';
-- 查看那个表被锁住
SHOW OPEN TABLES WHERE In_use > 0;
-- 查看哪个事物占用锁 -- 查看哪个事物占用锁
select * from information_schema.innodb_trx; select * from information_schema.innodb_trx;
-- 杀死进程
kill trx_mysql_thread_id;
select trx_mysql_thread_id from information_schema.innodb_trx where trx_state ='LOCK WAIT '; select trx_mysql_thread_id from information_schema.innodb_trx where trx_state ='LOCK WAIT ';
-- 查看所有进程 -- 查看所有进程
show full processlist; show full processlist;