dbatools

0.9.156

bin/xetemplates/xe_log_io_tracking.xml

                                <event_sessions xmlns="http://schemas.microsoft.com/sqlserver/2008/07/extendedeventconfig">

  <event_session name="log_io" maxMemory="4" eventRetentionMode="allowSingleEventLoss" trackCausality="false" dispatchLatency="30" maxEventSize="0" memoryPartitionMode="none">

    <templateCategory>

      <!-- _locID_text="templateCategory" _locComment = "" -->System Monitoring</templateCategory>

    <templateName>

      <!-- _locID_text = "templateName" _locComment = "" -->Database Log File IO Tracking</templateName>

    <templateDescription>

      <!-- _locID_text = "templateDescription" _locComment = "" -->This template monitors the IO for database log files on a server by tracking asynchronous IO, database log flushes, file writes, spinlock backoffs of type LOGFLUSHQ and waits of type WRITELOG. This template collects data in two ways: raw data is collected to a ring buffer and spinlock backoff information is aggregated based on the input buffer (sql_text). The session is filtered for a single log file per database; if you have multiple log files you can modify the filter for the file_write_completed and file_written events to include more than just file_id = 2.</templateDescription>

    <event package="sqlos" name="async_io_completed" />

    <event package="sqlos" name="async_io_requested" />

    <event package="sqlos" name="spinlock_backoff">

      <action package="sqlserver" name="sql_text" />

      <predicate>

        <leaf>

          <comparator name="equal_uint64" package="package0"></comparator>

          <event name="spinlock_backoff" package="sqlos" field="type"></event>

          <value>85</value>

        </leaf>

      </predicate>

    </event>

    <event package="sqlos" name="wait_info">

      <action package="sqlserver" name="client_app_name" />

      <action package="sqlserver" name="is_system" />

      <action package="sqlserver" name="session_id" />

      <predicate>

        <and>

          <leaf>

            <comparator name="equal_uint64" package="package0"></comparator>

            <event name="wait_info" package="sqlos" field="opcode"></event>

            <value>1</value>

          </leaf>

          <leaf>

            <comparator name="equal_uint64" package="package0"></comparator>

            <event name="wait_info" package="sqlos" field="wait_type"></event>

            <value>182</value>

          </leaf>

        </and>

      </predicate>

    </event>

    <event package="sqlserver" name="databases_log_flush" />

    <event package="sqlserver" name="file_write_completed">

      <parameter name="collect_path" value="1" />

      <predicate>

        <leaf>

          <comparator name="equal_uint64" package="package0"></comparator>

          <event name="file_write_completed" package="sqlserver" field="file_id"></event>

          <value>2</value>

        </leaf>

      </predicate>

    </event>

    <event package="sqlserver" name="file_written">

      <parameter name="collect_path" value="1" />

      <predicate>

        <leaf>

          <comparator name="equal_uint64" package="package0"></comparator>

          <event name="file_written" package="sqlserver" field="file_id"></event>

          <value>2</value>

        </leaf>

      </predicate>

    </event>

    <target package="package0" name="histogram">

      <parameter name="filtering_event_name" value="sqlos.spinlock_backoff" />

      <parameter name="source" value="sqlserver.sql_text" />

    </target>

    <target package="package0" name="ring_buffer" />

  </event_session>

</event_sessions>