Help Center > > User Guide> MySQL DB Instance Management (Standard Edition)> CloudDBA> InnoDB Lock Query

InnoDB Lock Query

Updated at: Sep 29, 2020 GMT+08:00

Scenarios

InnoDB lock status management allows you to diagnose conflicts during execution of transactions or sessions with a few clicks. By querying the lock status, you can obtain the lock-holding and lock-wait information of transactions, such as the transaction status, session ID, locked table, and locked data range.

Currently, the InnoDB lock status query is in the open beta test period.

Prerequisites

You have logged in to a MySQL DB instance on the DAS console.

Procedures

  1. On the menu bar, choose CloudDBA > InnoDB Lock Wait. If there is no transaction waiting for a lock, click the refresh button to view the latest lock query information.
    Figure 1 InnoDB lock query
  2. On the displayed page, the lock-holding and lock-wait information is displayed if a transaction is waiting for a lock.
    Figure 2 Querying the InnoDB lock
  3. Move the cursor above an icon to view its detailed information.
    Figure 3 Lock details
  4. Click the lock-holding or lock-wait icon. A dialog box for killing the session is displayed.
    Figure 4 Killing a session
    • The default lock wait timeout is 50s. You can modify the innodb_lock_wait_timeout parameter to change the timeout value.
    • The SQL window execution timeout is 300s.

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