46.3. Vacuum Processes
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46.3. Vacuum Processes #

46.3.1. Viewing Vacuum Processes
46.3.2. Canceling a Vacuum Process
46.3.3. Terminating the User Session for a Vacuum Process

You can view information about vacuum (VACUUM) and autovacuum (autovacuum) processes. The information is based on the pg_stat_progress_vacuum view.

46.3.1. Viewing Vacuum Processes #

Go to vacuum processes in one of the following ways:

  • Using the monitoring section:

    1. In the navigation panel, go to Monitoring → Activity.

    2. Select Vacuum, and then in the top-right corner of the page, select the instance and database.

  • Using the configuration section of an instance:

    1. In the navigation panel, go to Infrastructure → Instances.

    2. Click the name of the instance.

    3. In the navigation panel, go to Activity.

    4. Select Vacuum, and then in the top-right corner of the page, select the database.

The table of vacuum processes with the following columns will be displayed:

  • PID: The ID of the backend.

  • State: The state of the backend.

    For more information about possible values, refer to the official Postgres Pro documentation on the pg_stat_activity module (refer to the state column).

  • Wait event: The name and type of the wait event for the backend.

    For more information, refer to the official Postgres Pro documentation on the pg_stat_activity module (refer to wait_event_type and wait_event columns).

  • Phase: The vacuum phase.

    For more information about possible values, refer to the official Postgres Pro documentation.

  • Database: The name of the database being vacuumed.

  • User: The name of the DBMS user on behalf of which vacuum is being performed.

  • Table: The name or ID of the table being vacuumed.

  • Query: The text of the current or last backend query.

  • Query duration: The duration of the current or last backend query.

  • Heap size: The size of the table for which vacuum is being performed.

  • Total size: The total size of the table, including indexes, for which vacuum is being performed.

  • Scanned, %: The percentage of data scanned in the table being vacuumed.

    This column includes additional information:

    Size: The size of scanned table data.

  • Vacuumed, %: The percentage of vacuumed table data.

    This column includes additional information:

    Size: The size of vacuumed table data.

  • Index vacuum: The number of vacuumed table indexes.

  • Memory usage, %: Usage of the memory that stores pointers to expired versions of table rows.

    For more information, refer to the official Postgres Pro documentation on the autovacuum_work_mem and maintenance_work_mem parameters.

  • Actions.

    For more information about available actions, refer to the corresponding instructions.

46.3.2. Canceling a Vacuum Process #

Canceling a vacuum process does not terminate a user session.

To cancel a vacuum process:

  1. Go to vacuum processes in one of the following ways:

    • Using the monitoring section:

      1. In the navigation panel, go to Monitoring → Activity.

      2. Select Vacuum, and then in the top-right corner of the page, select the instance and database.

    • Using the configuration section of an instance:

      1. In the navigation panel, go to Infrastructure → Instances.

      2. Click the name of the instance.

      3. In the navigation panel, go to Activity.

      4. Select Vacuum, and then in the top-right corner of the page, select the database.

  2. Click Cancel current request next to the vacuum process.

  3. Click Execute.

46.3.3. Terminating the User Session for a Vacuum Process #

When the user session is terminated, the vacuum process is canceled automatically.

To terminate the user session for a vacuum process:

  1. Go to vacuum processes in one of the following ways:

    • Using the monitoring section:

      1. In the navigation panel, go to Monitoring → Activity.

      2. Select Vacuum, and then in the top-right corner of the page, select the instance and database.

    • Using the configuration section of an instance:

      1. In the navigation panel, go to Infrastructure → Instances.

      2. Click the name of the instance.

      3. In the navigation panel, go to Activity.

      4. Select Vacuum, and then in the top-right corner of the page, select the database.

  2. Click Cancel session next to the vacuum process.

  3. Click Execute.

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46.2. Wait Event Statistics Home 46.4. Statistics Collection Processes