Help Center> GaussDB> User Guide> Logs> Viewing Slow Query Logs
View PDF

Viewing Slow Query Logs

Scenarios

Slow query logs record statements that exceed long_query_time (1 second by default). You can view log details and statistics to identify the statements that are executing slowly and optimize the statements.

GaussDB(for MySQL) supports the following statement types:
  • SELECT
  • INSERT
  • UPDATE
  • DELETE
  • CREATE
  • ALTER
  • DROP

Parameter Description

Table 1 Parameters related to MySQL slow queries

Parameter

Description

long_query_time

Specifies the time greater than or equal to which slow query logs are recorded. The precision is microsecond. The default value is 1s. When the execution time of an SQL statement exceeds the value of this parameter, the SQL statement is recorded in slow query logs.

The recommended value is 1s. Note: The lock wait time is not calculated into the query time.

log_queries_not_using_indexes

Specifies whether to record the slow query that without indexes. The default value is OFF.

log_throttle_queries_not_using_indexes

Specifies the SQL statement that can be written to the slow query log every minute. The default value is 0.

Viewing Log Details

  1. Log in to the management console.
  2. Click in the upper left corner and select a region and a project.
  3. Click Service List. Under Database, click GaussDB.
  4. On the Instance Management page, click the target DB instance. The Basic Information page is displayed.
  5. In the navigation pane on the left, choose Logs.
  6. On the Slow Query Logs page, view the slow query log details.

    You can view the slow query log records of a specified execution statement type or a specific time period.

Parent topic: Logs