【MySQL】状態確認用のSQL文

innodbの状態を確認する

SQL文

show engine innodb status\G

1	show engine innodb status\G

用途

重いsqlがどこまで行っているかを確認するなど。（出力例の「TRANSACTION」部分参照）

出力例

*************************** 1. row *************************** Type: InnoDB Name: Status: ===================================== 2014-05-27 06:35:07 2b9629f27700 INNODB MONITOR OUTPUT ===================================== Per second averages calculated from the last 58 seconds ----------------- BACKGROUND THREAD ----------------- srv_master_thread loops: 486050 srv_active, 0 srv_shutdown, 5904931 srv_idle srv_master_thread log flush and writes: 6390969 ---------- SEMAPHORES ---------- OS WAIT ARRAY INFO: reservation count 41621 OS WAIT ARRAY INFO: signal count 41624 Mutex spin waits 162, rounds 4825, OS waits 125 RW-shared spins 41739, rounds 1252770, OS waits 41446 RW-excl spins 5, rounds 1540, OS waits 49 Spin rounds per wait: 29.78 mutex, 30.01 RW-shared, 308.00 RW-excl ------------ TRANSACTIONS ------------ Trx id counter 2508259 Purge done for trx's n:o < 2508171 undo n:o < 0 state: running but idle History list length 1521 LIST OF TRANSACTIONS FOR EACH SESSION: ---TRANSACTION 0, not started MySQL thread id 93532, OS thread handle 0x2b9629f27700, query id 16852600 10.1.10.10 Cherubim init show engine innodb status ---TRANSACTION 2508258, not started MySQL thread id 27857, OS thread handle 0x2b9629644700, query id 16852599 localhost 127.0.0.1 rdsadmin cleaning up -------- FILE I/O -------- I/O thread 0 state: waiting for completed aio requests (insert buffer thread) I/O thread 1 state: waiting for completed aio requests (log thread) I/O thread 2 state: waiting for completed aio requests (read thread) I/O thread 3 state: waiting for completed aio requests (read thread) I/O thread 4 state: waiting for completed aio requests (read thread) I/O thread 5 state: waiting for completed aio requests (read thread) I/O thread 6 state: waiting for completed aio requests (write thread) I/O thread 7 state: waiting for completed aio requests (write thread) I/O thread 8 state: waiting for completed aio requests (write thread) I/O thread 9 state: waiting for completed aio requests (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: 0 260 OS file reads, 447106 OS file writes, 381164 OS fsyncs 0.00 reads/s, 0 avg bytes/read, 1.17 writes/s, 0.74 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 5530309, node heap has 11 buffer(s) 113.95 hash searches/s, 15.17 non-hash searches/s --- LOG --- Log sequence number 43098372 Log flushed up to 43098372 Pages flushed up to 43098372 Last checkpoint at 43098372 0 pending log writes, 0 pending chkp writes 119585 log i/o's done, 0.29 log i/o's/second ---------------------- BUFFER POOL AND MEMORY ---------------------- Total memory allocated 2859991040; in additional pool allocated 0 Dictionary memory allocated 315915 Buffer pool size 170556 Free buffers 169584 Database pages 961 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 241, created 720, written 203532 0.00 reads/s, 0.00 creates/s, 0.67 writes/s Buffer pool hit rate 1000 / 1000, young-making rate 0 / 1000 not 0 / 1000 Pages read ahead 0.00/s, evicted without access 0.00/s, Random read ahead 0.00/s LRU len: 961, unzip_LRU len: 0 I/O sum[0]:cur[0], unzip sum[0]:cur[0] ---------------------- INDIVIDUAL BUFFER POOL INFO ---------------------- ---BUFFER POOL 0 Buffer pool size 21319 Free buffers 21139 Database pages 179 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 34, created 145, written 48215 0.00 reads/s, 0.00 creates/s, 0.10 writes/s Buffer pool hit rate 1000 / 1000, young-making rate 0 / 1000 not 0 / 1000 Pages read ahead 0.00/s, evicted without access 0.00/s, Random read ahead 0.00/s LRU len: 179, unzip_LRU len: 0 I/O sum[0]:cur[0], unzip sum[0]:cur[0] ---BUFFER POOL 1 Buffer pool size 21320 Free buffers 21277 Database pages 43 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 0, created 43, written 945 0.00 reads/s, 0.00 creates/s, 0.00 writes/s Buffer pool hit rate 1000 / 1000, young-making rate 0 / 1000 not 0 / 1000 Pages read ahead 0.00/s, evicted without access 0.00/s, Random read ahead 0.00/s LRU len: 43, unzip_LRU len: 0 I/O sum[0]:cur[0], unzip sum[0]:cur[0] ---BUFFER POOL 2 Buffer pool size 21319 Free buffers 21266 Database pages 52 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 2, created 50, written 409 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: 52, unzip_LRU len: 0 I/O sum[0]:cur[0], unzip sum[0]:cur[0] ---BUFFER POOL 3 Buffer pool size 21320 Free buffers 21211 Database pages 109 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 68, created 41, written 30912 0.00 reads/s, 0.00 creates/s, 0.07 writes/s Buffer pool hit rate 1000 / 1000, young-making rate 0 / 1000 not 0 / 1000 Pages read ahead 0.00/s, evicted without access 0.00/s, Random read ahead 0.00/s LRU len: 109, unzip_LRU len: 0 I/O sum[0]:cur[0], unzip sum[0]:cur[0] ---BUFFER POOL 4 Buffer pool size 21319 Free buffers 21208 Database pages 108 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 67, created 41, written 25538 0.00 reads/s, 0.00 creates/s, 0.10 writes/s Buffer pool hit rate 1000 / 1000, young-making rate 0 / 1000 not 0 / 1000 Pages read ahead 0.00/s, evicted without access 0.00/s, Random read ahead 0.00/s LRU len: 108, unzip_LRU len: 0 I/O sum[0]:cur[0], unzip sum[0]:cur[0] ---BUFFER POOL 5 Buffer pool size 21320 Free buffers 21143 Database pages 176 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 60, created 116, written 31743 0.00 reads/s, 0.00 creates/s, 0.09 writes/s Buffer pool hit rate 1000 / 1000, young-making rate 0 / 1000 not 0 / 1000 Pages read ahead 0.00/s, evicted without access 0.00/s, Random read ahead 0.00/s LRU len: 176, unzip_LRU len: 0 I/O sum[0]:cur[0], unzip sum[0]:cur[0] ---BUFFER POOL 6 Buffer pool size 21319 Free buffers 21165 Database pages 151 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 5, created 146, written 36841 0.00 reads/s, 0.00 creates/s, 0.16 writes/s Buffer pool hit rate 1000 / 1000, young-making rate 0 / 1000 not 0 / 1000 Pages read ahead 0.00/s, evicted without access 0.00/s, Random read ahead 0.00/s LRU len: 151, unzip_LRU len: 0 I/O sum[0]:cur[0], unzip sum[0]:cur[0] ---BUFFER POOL 7 Buffer pool size 21320 Free buffers 21175 Database pages 143 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 5, created 138, written 28929 0.00 reads/s, 0.00 creates/s, 0.16 writes/s Buffer pool hit rate 1000 / 1000, young-making rate 0 / 1000 not 0 / 1000 Pages read ahead 0.00/s, evicted without access 0.00/s, Random read ahead 0.00/s LRU len: 143, 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. 15691, id 47923922183936, state: sleeping Number of rows inserted 14711, updated 53075, deleted 2927, read 34170465 0.00 inserts/s, 0.24 updates/s, 0.00 deletes/s, 156.03 reads/s ---------------------------- END OF INNODB MONITOR OUTPUT ============================ 1 row in set (0.00 sec)

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*************************** 1. row ***************************   Type: InnoDB   Name: Status: ===================================== 2014-05-27 06:35:07 2b9629f27700 INNODB MONITOR OUTPUT ===================================== Per second averages calculated from the last 58 seconds ----------------- BACKGROUND THREAD ----------------- srv_master_thread loops: 486050 srv_active, 0 srv_shutdown, 5904931 srv_idle srv_master_thread log flush and writes: 6390969 ---------- SEMAPHORES ---------- OS WAIT ARRAY INFO: reservation count 41621 OS WAIT ARRAY INFO: signal count 41624 Mutex spin waits 162, rounds 4825, OS waits 125 RW-shared spins 41739, rounds 1252770, OS waits 41446 RW-excl spins 5, rounds 1540, OS waits 49 Spin rounds per wait: 29.78 mutex, 30.01 RW-shared, 308.00 RW-excl ------------ TRANSACTIONS ------------ Trx id counter 2508259 Purge done for trx's n:o < 2508171 undo n:o < 0 state: running but idle History list length 1521 LIST OF TRANSACTIONS FOR EACH SESSION: ---TRANSACTION 0, not started MySQL thread id 93532, OS thread handle 0x2b9629f27700, query id 16852600 10.1.10.10 Cherubim init show engine innodb status ---TRANSACTION 2508258, not started MySQL thread id 27857, OS thread handle 0x2b9629644700, query id 16852599 localhost 127.0.0.1 rdsadmin cleaning up -------- FILE I/O -------- I/O thread 0 state: waiting for completed aio requests (insert buffer thread) I/O thread 1 state: waiting for completed aio requests (log thread) I/O thread 2 state: waiting for completed aio requests (read thread) I/O thread 3 state: waiting for completed aio requests (read thread) I/O thread 4 state: waiting for completed aio requests (read thread) I/O thread 5 state: waiting for completed aio requests (read thread) I/O thread 6 state: waiting for completed aio requests (write thread) I/O thread 7 state: waiting for completed aio requests (write thread) I/O thread 8 state: waiting for completed aio requests (write thread) I/O thread 9 state: waiting for completed aio requests (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: 0 260 OS file reads, 447106 OS file writes, 381164 OS fsyncs 0.00 reads/s, 0 avg bytes/read, 1.17 writes/s, 0.74 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 5530309, node heap has 11 buffer(s) 113.95 hash searches/s, 15.17 non-hash searches/s --- LOG --- Log sequence number 43098372 Log flushed up to   43098372 Pages flushed up to 43098372 Last checkpoint at  43098372 0 pending log writes, 0 pending chkp writes 119585 log i/o's done, 0.29 log i/o's/second ---------------------- BUFFER POOL AND MEMORY ---------------------- Total memory allocated 2859991040; in additional pool allocated 0 Dictionary memory allocated 315915 Buffer pool size   170556 Free buffers       169584 Database pages     961 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 241, created 720, written 203532 0.00 reads/s, 0.00 creates/s, 0.67 writes/s Buffer pool hit rate 1000 / 1000, young-making rate 0 / 1000 not 0 / 1000 Pages read ahead 0.00/s, evicted without access 0.00/s, Random read ahead 0.00/s LRU len: 961, unzip_LRU len: 0 I/O sum[0]:cur[0], unzip sum[0]:cur[0] ---------------------- INDIVIDUAL BUFFER POOL INFO ---------------------- ---BUFFER POOL 0 Buffer pool size   21319 Free buffers       21139 Database pages     179 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 34, created 145, written 48215 0.00 reads/s, 0.00 creates/s, 0.10 writes/s Buffer pool hit rate 1000 / 1000, young-making rate 0 / 1000 not 0 / 1000 Pages read ahead 0.00/s, evicted without access 0.00/s, Random read ahead 0.00/s LRU len: 179, unzip_LRU len: 0 I/O sum[0]:cur[0], unzip sum[0]:cur[0] ---BUFFER POOL 1 Buffer pool size   21320 Free buffers       21277 Database pages     43 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 0, created 43, written 945 0.00 reads/s, 0.00 creates/s, 0.00 writes/s Buffer pool hit rate 1000 / 1000, young-making rate 0 / 1000 not 0 / 1000 Pages read ahead 0.00/s, evicted without access 0.00/s, Random read ahead 0.00/s LRU len: 43, unzip_LRU len: 0 I/O sum[0]:cur[0], unzip sum[0]:cur[0] ---BUFFER POOL 2 Buffer pool size   21319 Free buffers       21266 Database pages     52 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 2, created 50, written 409 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: 52, unzip_LRU len: 0 I/O sum[0]:cur[0], unzip sum[0]:cur[0] ---BUFFER POOL 3 Buffer pool size   21320 Free buffers       21211 Database pages     109 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 68, created 41, written 30912 0.00 reads/s, 0.00 creates/s, 0.07 writes/s Buffer pool hit rate 1000 / 1000, young-making rate 0 / 1000 not 0 / 1000 Pages read ahead 0.00/s, evicted without access 0.00/s, Random read ahead 0.00/s LRU len: 109, unzip_LRU len: 0 I/O sum[0]:cur[0], unzip sum[0]:cur[0] ---BUFFER POOL 4 Buffer pool size   21319 Free buffers       21208 Database pages     108 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 67, created 41, written 25538 0.00 reads/s, 0.00 creates/s, 0.10 writes/s Buffer pool hit rate 1000 / 1000, young-making rate 0 / 1000 not 0 / 1000 Pages read ahead 0.00/s, evicted without access 0.00/s, Random read ahead 0.00/s LRU len: 108, unzip_LRU len: 0 I/O sum[0]:cur[0], unzip sum[0]:cur[0] ---BUFFER POOL 5 Buffer pool size   21320 Free buffers       21143 Database pages     176 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 60, created 116, written 31743 0.00 reads/s, 0.00 creates/s, 0.09 writes/s Buffer pool hit rate 1000 / 1000, young-making rate 0 / 1000 not 0 / 1000 Pages read ahead 0.00/s, evicted without access 0.00/s, Random read ahead 0.00/s LRU len: 176, unzip_LRU len: 0 I/O sum[0]:cur[0], unzip sum[0]:cur[0] ---BUFFER POOL 6 Buffer pool size   21319 Free buffers       21165 Database pages     151 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 5, created 146, written 36841 0.00 reads/s, 0.00 creates/s, 0.16 writes/s Buffer pool hit rate 1000 / 1000, young-making rate 0 / 1000 not 0 / 1000 Pages read ahead 0.00/s, evicted without access 0.00/s, Random read ahead 0.00/s LRU len: 151, unzip_LRU len: 0 I/O sum[0]:cur[0], unzip sum[0]:cur[0] ---BUFFER POOL 7 Buffer pool size   21320 Free buffers       21175 Database pages     143 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 5, created 138, written 28929 0.00 reads/s, 0.00 creates/s, 0.16 writes/s Buffer pool hit rate 1000 / 1000, young-making rate 0 / 1000 not 0 / 1000 Pages read ahead 0.00/s, evicted without access 0.00/s, Random read ahead 0.00/s LRU len: 143, 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. 15691, id 47923922183936, state: sleeping Number of rows inserted 14711, updated 53075, deleted 2927, read 34170465 0.00 inserts/s, 0.24 updates/s, 0.00 deletes/s, 156.03 reads/s ---------------------------- END OF INNODB MONITOR OUTPUT ============================   1 row in set (0.00 sec)

プロセスリストを確認

SQL文

show processlist;

1	show processlist;

出力例

mysql> show processlist; +-------+------------+------------------+------------+---------+------+-------+------------------+ | Id | User | Host | db | Command | Time | State | Info | +-------+------------+------------------+------------+---------+------+-------+------------------+ | 27857 | rdsadmin | localhost:52269 | NULL | Sleep | 11 | | NULL | | 93532 | Cherubim | 10.1.10.10:34972 | NULL | Query | 0 | init | show processlist | +-------+------------+------------------+------------+---------+------+-------+------------------+ 2 rows in set (0.00 sec)

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mysql> show processlist; +-------+------------+------------------+------------+---------+------+-------+------------------+ | Id    | User       | Host             | db         | Command | Time | State | Info             | +-------+------------+------------------+------------+---------+------+-------+------------------+ | 27857 | rdsadmin   | localhost:52269  | NULL       | Sleep   |   11 |       | NULL             | | 93532 | Cherubim   | 10.1.10.10:34972 | NULL       | Query   |    0 | init  | show processlist | +-------+------------+------------------+------------+---------+------+-------+------------------+ 2 rows in set (0.00 sec)

プロセスリストを確認

SQL文

mysql> SET profiling = 1; mysql> SELECT ... mysql> SHOW PROFILE;

1 2 3

mysql> SET profiling = 1; mysql> SELECT ... mysql> SHOW PROFILE;

用途

実行にかかった時間を出力してくるから、どの部分が一番時間かかってるを確認するのに向いている。

出力例

mysql> SHOW PROFILE; +----------------------+----------+ | Status | Duration | +----------------------+----------+ | starting | 0.000108 | | checking permissions | 0.000031 | | Opening tables | 0.000048 | | init | 0.000065 | | System lock | 0.000033 | | optimizing | 0.000025 | | statistics | 0.000047 | | preparing | 0.000038 | | executing | 0.000021 | | Sending data | 0.000137 | | end | 0.000023 | | query end | 0.000027 | | closing tables | 0.000029 | | freeing items | 0.000093 | | cleaning up | 0.000024 | +----------------------+----------+ 15 rows in set, 1 warning (0.00 sec)

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mysql> SHOW PROFILE; +----------------------+----------+ | Status               | Duration | +----------------------+----------+ | starting             | 0.000108 | | checking permissions | 0.000031 | | Opening tables       | 0.000048 | | init                 | 0.000065 | | System lock          | 0.000033 | | optimizing           | 0.000025 | | statistics           | 0.000047 | | preparing            | 0.000038 | | executing            | 0.000021 | | Sending data         | 0.000137 | | end                  | 0.000023 | | query end            | 0.000027 | | closing tables       | 0.000029 | | freeing items        | 0.000093 | | cleaning up          | 0.000024 | +----------------------+----------+ 15 rows in set, 1 warning (0.00 sec)

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