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Update README and examples for the innodb_lock_waits view additions
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@MarkLeith
MarkLeith committed Mar 9, 2015
1 parent cc25c12 commit d56c057
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135 changes: 79 additions & 56 deletions README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -575,71 +575,94 @@ The lock waits are ordered by the age of the lock descending.

```SQL
mysql> desc innodb_lock_waits;
+--------------------+---------------------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+--------------------+---------------------+------+-----+---------+-------+
| wait_started | datetime | YES | | NULL | |
| wait_age | time | YES | | NULL | |
| locked_table | varchar(1024) | NO | | | |
| locked_index | varchar(1024) | YES | | NULL | |
| locked_type | varchar(32) | NO | | | |
| waiting_trx_id | varchar(18) | NO | | | |
| waiting_pid | bigint(21) unsigned | NO | | 0 | |
| waiting_query | longtext | YES | | NULL | |
| waiting_lock_id | varchar(81) | NO | | | |
| waiting_lock_mode | varchar(32) | NO | | | |
| blocking_trx_id | varchar(18) | NO | | | |
| blocking_pid | bigint(21) unsigned | NO | | 0 | |
| blocking_query | longtext | YES | | NULL | |
| blocking_lock_id | varchar(81) | NO | | | |
| blocking_lock_mode | varchar(32) | NO | | | |
+--------------------+---------------------+------+-----+---------+-------+
15 rows in set (0.23 sec)
+----------------------------+---------------------+------+-----+---------------------+-------+
| Field | Type | Null | Key | Default | Extra |
+----------------------------+---------------------+------+-----+---------------------+-------+
| wait_started | datetime | YES | | NULL | |
| wait_age | time | YES | | NULL | |
| locked_table | varchar(1024) | NO | | | |
| locked_index | varchar(1024) | YES | | NULL | |
| locked_type | varchar(32) | NO | | | |
| waiting_trx_id | varchar(18) | NO | | | |
| waiting_trx_started | datetime | NO | | 0000-00-00 00:00:00 | |
| waiting_trx_age | time | YES | | NULL | |
| waiting_trx_rows_locked | bigint(21) unsigned | NO | | 0 | |
| waiting_trx_rows_modified | bigint(21) unsigned | NO | | 0 | |
| waiting_pid | bigint(21) unsigned | NO | | 0 | |
| waiting_query | longtext | YES | | NULL | |
| waiting_lock_id | varchar(81) | NO | | | |
| waiting_lock_mode | varchar(32) | NO | | | |
| blocking_trx_id | varchar(18) | NO | | | |
| blocking_pid | bigint(21) unsigned | NO | | 0 | |
| blocking_query | longtext | YES | | NULL | |
| blocking_lock_id | varchar(81) | NO | | | |
| blocking_lock_mode | varchar(32) | NO | | | |
| blocking_trx_started | datetime | NO | | 0000-00-00 00:00:00 | |
| blocking_trx_age | time | YES | | NULL | |
| blocking_trx_rows_locked | bigint(21) unsigned | NO | | 0 | |
| blocking_trx_rows_modified | bigint(21) unsigned | NO | | 0 | |
+----------------------------+---------------------+------+-----+---------------------+-------+
23 rows in set (0.00 sec)
mysql> desc x$innodb_lock_waits;
+--------------------+---------------------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+--------------------+---------------------+------+-----+---------+-------+
| wait_started | datetime | YES | | NULL | |
| wait_age | time | YES | | NULL | |
| locked_table | varchar(1024) | NO | | | |
| locked_index | varchar(1024) | YES | | NULL | |
| locked_type | varchar(32) | NO | | | |
| waiting_trx_id | varchar(18) | NO | | | |
| waiting_pid | bigint(21) unsigned | NO | | 0 | |
| waiting_query | varchar(1024) | YES | | NULL | |
| waiting_lock_id | varchar(81) | NO | | | |
| waiting_lock_mode | varchar(32) | NO | | | |
| blocking_trx_id | varchar(18) | NO | | | |
| blocking_pid | bigint(21) unsigned | NO | | 0 | |
| blocking_query | varchar(1024) | YES | | NULL | |
| blocking_lock_id | varchar(81) | NO | | | |
| blocking_lock_mode | varchar(32) | NO | | | |
+--------------------+---------------------+------+-----+---------+-------+
15 rows in set (0.01 sec)
+----------------------------+---------------------+------+-----+---------------------+-------+
| Field | Type | Null | Key | Default | Extra |
+----------------------------+---------------------+------+-----+---------------------+-------+
| wait_started | datetime | YES | | NULL | |
| wait_age | time | YES | | NULL | |
| locked_table | varchar(1024) | NO | | | |
| locked_index | varchar(1024) | YES | | NULL | |
| locked_type | varchar(32) | NO | | | |
| waiting_trx_id | varchar(18) | NO | | | |
| waiting_trx_started | datetime | NO | | 0000-00-00 00:00:00 | |
| waiting_trx_age | time | YES | | NULL | |
| waiting_trx_rows_locked | bigint(21) unsigned | NO | | 0 | |
| waiting_trx_rows_modified | bigint(21) unsigned | NO | | 0 | |
| waiting_pid | bigint(21) unsigned | NO | | 0 | |
| waiting_query | varchar(1024) | YES | | NULL | |
| waiting_lock_id | varchar(81) | NO | | | |
| waiting_lock_mode | varchar(32) | NO | | | |
| blocking_trx_id | varchar(18) | NO | | | |
| blocking_pid | bigint(21) unsigned | NO | | 0 | |
| blocking_query | varchar(1024) | YES | | NULL | |
| blocking_lock_id | varchar(81) | NO | | | |
| blocking_lock_mode | varchar(32) | NO | | | |
| blocking_trx_started | datetime | NO | | 0000-00-00 00:00:00 | |
| blocking_trx_age | time | YES | | NULL | |
| blocking_trx_rows_locked | bigint(21) unsigned | NO | | 0 | |
| blocking_trx_rows_modified | bigint(21) unsigned | NO | | 0 | |
+----------------------------+---------------------+------+-----+---------------------+-------+
23 rows in set (0.12 sec)
```

##### Example

```SQL
mysql> SELECT * FROM innodb_lock_waits\G
*************************** 1. row ***************************
wait_started: 2014-11-11 13:39:20
wait_age: 00:00:07
locked_table: `db1`.`t1`
locked_index: PRIMARY
locked_type: RECORD
waiting_trx_id: 867158
waiting_pid: 3
waiting_query: UPDATE t1 SET val = val + 1 WHERE id = 2
waiting_lock_id: 867158:2363:3:3
waiting_lock_mode: X
blocking_trx_id: 867157
blocking_pid: 4
blocking_query: UPDATE t1 SET val = val + 1 + SLEEP(10) WHERE id = 2
blocking_lock_id: 867157:2363:3:3
blocking_lock_mode: X
1 row in set (0.01 sec)
wait_started: 2014-11-11 13:39:20
wait_age: 00:00:07
locked_table: `db1`.`t1`
locked_index: PRIMARY
locked_type: RECORD
waiting_trx_id: 867158
waiting_trx_started: 2014-11-11 13:39:15
waiting_trx_age: 00:00:12
waiting_trx_rows_locked: 0
waiting_trx_rows_modified: 0
waiting_pid: 3
waiting_query: UPDATE t1 SET val = val + 1 WHERE id = 2
waiting_lock_id: 867158:2363:3:3
waiting_lock_mode: X
blocking_trx_id: 867157
blocking_pid: 4
blocking_query: UPDATE t1 SET val = val + 1 + SLEEP(10) WHERE id = 2
blocking_lock_id: 867157:2363:3:3
blocking_lock_mode: X
blocking_trx_started: 2014-11-11 13:39:11
blocking_trx_age: 00:00:16
blocking_trx_rows_locked: 1
blocking_trx_rows_modified: 1
```

#### io_by_thread_by_latency / x$io_by_thread_by_latency
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2 changes: 1 addition & 1 deletion views/i_s/innodb_lock_waits.sql
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Expand Up @@ -34,7 +34,7 @@
-- waiting_trx_rows_locked: 0
-- waiting_trx_rows_modified: 0
-- waiting_pid: 3
-- waiting_query: UPDATE t1 SET val = val + 1 WHERE id = 2
-- waiting_query: UPDATE t1 SET val = val + 1 WHERE id = 2
-- waiting_lock_id: 867158:2363:3:3
-- waiting_lock_mode: X
-- blocking_trx_id: 867157
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