MYSQL show engine等实用 command

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原创最新推荐文章于 2026-05-04 08:00:00 发布 1.8k 阅读 AI 写同款· GEO 优化 ›

MySQL性能分析之show processlist及information_schema.processlist详解简要说明show processlist和processlist表的使用，重点介绍state、info、time等属性的解释、如何应用于实际分析阅读详情

看DB参数和数据用：show status;

>>show tables from information_schema;

MySQL>> show create table ossOperationType;

| Table | Create Table |
+---------------------------------------------
| ossOperationType | CREATE TABLE `ossOperationType` (
`ossOperationTypeId` binary(1) NOT NULL,
`ssInThePLMNId` binary(2) NOT NULL,
`mobileNetworkCodeId` binary(3) NOT NULL,
`mobileCountryCodeId` binary(3) NOT NULL,
`stringIA5` binary(17) DEFAULT NULL,
`stringUssd` binary(17) DEFAULT NULL,
`stringUcs2` binary(17) DEFAULT NULL,
`ossOperationTypeTime` bigint(20) /*!50606 COLUMN_FORMAT DYNAMIC */ DEFAULT NULL,
PRIMARY KEY (`ossOperationTypeId`,`ssInThePLMNId`,`mobileNetworkCodeId`,`mobileCountryCodeId`) USING HASH
) ENGINE=ndbcluster DEFAULT CHARSET=latin1 COLLATE=latin1_bin
/*!50100 PARTITION BY KEY (ossOperationTypeId) */ |
+---------------------+
1 row in set (0.01 sec)

mysql> show status;

...

.....

看存储引擎参数：

mysql> show engine innodb status\G;

*************************** 1. row ***************************
Type: InnoDB
Name:
Status:
=====================================
2016-05-06 14:12:46 7f406e04c700 INNODB MONITOR OUTPUT
=====================================
Per second averages calculated from the last 22 seconds
-----------------
BACKGROUND THREAD
-----------------
srv_master_thread loops: 1 srv_active, 0 srv_shutdown, 488673 srv_idle
srv_master_thread log flush and writes: 488674
----------
SEMAPHORES
----------
OS WAIT ARRAY INFO: reservation count 2
OS WAIT ARRAY INFO: signal count 2
Mutex spin waits 0, rounds 0, OS waits 0
RW-shared spins 2, rounds 60, OS waits 2
RW-excl spins 0, rounds 0, OS waits 0
Spin rounds per wait: 0.00 mutex, 30.00 RW-shared, 0.00 RW-excl
------------
TRANSACTIONS
------------
Trx id counter 5381
Purge done for trx's n:o < 0 undo n:o < 0 state: running but idle
History list length 0
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 0, not started
MySQL thread id 9721, OS thread handle 0x7f406e04c700, query id 7570041 localhost admin init
show engine innodb status
--------
FILE I/O
--------
I/O thread 0 state: waiting for i/o request (insert buffer thread)
I/O thread 1 state: waiting for i/o request (log thread)
I/O thread 2 state: waiting for i/o request (read thread)
I/O thread 3 state: waiting for i/o request (read thread)
I/O thread 4 state: waiting for i/o request (read thread)
I/O thread 5 state: waiting for i/o request (read thread)
I/O thread 6 state: waiting for i/o request (write thread)
I/O thread 7 state: waiting for i/o request (write thread)
I/O thread 8 state: waiting for i/o request (write thread)
I/O thread 9 state: waiting for i/o request (write thread)
Pending normal aio reads: 0 [0, 0, 0, 0] , aio writes: 0 [0, 0, 0, 0] ,
ibuf aio reads: 0, log i/o's: 0, sync i/o's: 0
Pending flushes (fsync) log: 0; buffer pool: 0
318 OS file reads, 5 OS file writes, 5 OS fsyncs
0.00 reads/s, 0 avg bytes/read, 0.00 writes/s, 0.00 fsyncs/s
-------------------------------------
INSERT BUFFER AND ADAPTIVE HASH INDEX
-------------------------------------
Ibuf: size 1, free list len 0, seg size 2, 0 merges
merged operations:
insert 0, delete mark 0, delete 0
discarded operations:
insert 0, delete mark 0, delete 0
Hash table size 276707, node heap has 0 buffer(s)
0.00 hash searches/s, 0.00 non-hash searches/s
---
LOG
---
Log sequence number 1626067
Log flushed up to 1626067
Pages flushed up to 1626067
Last checkpoint at 1626067
0 pending log writes, 0 pending chkp writes
8 log i/o's done, 0.00 log i/o's/second
----------------------
BUFFER POOL AND MEMORY
----------------------
Total memory allocated 137363456; in additional pool allocated 0
Dictionary memory allocated 59957
Buffer pool size 8192
Free buffers 8023
Database pages 169
Old database pages 0
Modified db pages 0
Pending reads 0
Pending writes: LRU 0, flush list 0, single page 0
Pages made young 0, not young 0
0.00 youngs/s, 0.00 non-youngs/s
Pages read 169, created 0, written 1
0.00 reads/s, 0.00 creates/s, 0.00 writes/s
No buffer pool page gets since the last printout
Pages read ahead 0.00/s, evicted without access 0.00/s, Random read ahead 0.00/s
LRU len: 169, unzip_LRU len: 0
I/O sum[0]:cur[0], unzip sum[0]:cur[0]
--------------
ROW OPERATIONS
--------------
0 queries inside InnoDB, 0 queries in queue
0 read views open inside InnoDB
Main thread process no. 479821, id 139913752205056, state: sleeping
Number of rows inserted 0, updated 0, deleted 0, read 0
0.00 inserts/s, 0.00 updates/s, 0.00 deletes/s, 0.00 reads/s
----------------------------
END OF INNODB MONITOR OUTPUT
============================

1 row in set (0.00 sec)

ERROR:

No query specified

mysql> show engine ndbcluster status\G;
*************************** 1. row ***************************
Type: ndbcluster
Name: connection
Status: cluster_node_id=116, connected_host=STATION_A, connected_port=2200, number_of_data_nodes=14, number_of_ready_data_nodes=14, connect_count=0
*************************** 2. row ***************************
Type: ndbcluster
Name: NdbTransaction
Status: created=14, free=14, sizeof=368
*************************** 3. row ***************************
Type: ndbcluster
Name: NdbOperation
Status: created=28, free=28, sizeof=944
*************************** 4. row ***************************
Type: ndbcluster
Name: NdbIndexScanOperation
Status: created=0, free=0, sizeof=1152
*************************** 5. row ***************************
Type: ndbcluster
Name: NdbIndexOperation
Status: created=0, free=0, sizeof=952
*************************** 6. row ***************************
Type: ndbcluster
Name: NdbRecAttr
Status: created=0, free=0, sizeof=88
*************************** 7. row ***************************
Type: ndbcluster
Name: NdbApiSignal
Status: created=16, free=16, sizeof=144
*************************** 8. row ***************************
Type: ndbcluster
Name: NdbLabel
Status: created=0, free=0, sizeof=200
*************************** 9. row ***************************
Type: ndbcluster
Name: NdbBranch
Status: created=0, free=0, sizeof=32
*************************** 10. row ***************************
Type: ndbcluster
Name: NdbSubroutine
Status: created=0, free=0, sizeof=72
*************************** 11. row ***************************
Type: ndbcluster
Name: NdbCall
Status: created=0, free=0, sizeof=24
*************************** 12. row ***************************
Type: ndbcluster
Name: NdbBlob
Status: created=0, free=0, sizeof=496
*************************** 13. row ***************************
Type: ndbcluster
Name: NdbReceiver
Status: created=0, free=0, sizeof=128
*************************** 14. row ***************************
Type: ndbcluster
Name: NdbLockHandle
Status: created=0, free=0, sizeof=48
*************************** 15. row ***************************
Type: ndbcluster
Name: binlog
Status: latest_epoch=2005758317166600, latest_trans_epoch=2005758317166596, latest_received_binlog_epoch=2005758317166600, latest_handled_binlog_epoch=2005758317166600, latest_applied_binlog_epoch=2005758317166596
15 rows in set (0.00 sec)

ERROR:
No query specified