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doc-exports/docs/dws/dev/dws_04_0918.html
Lu, Huayi a24ca60074 DWS DEVELOPER 811 version 
Reviewed-by: Hasko, Vladimir <vladimir.hasko@t-systems.com>
Co-authored-by: Lu, Huayi <luhuayi@huawei.com>
Co-committed-by: Lu, Huayi <luhuayi@huawei.com>
2023-01-19 13:37:49 +00:00

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Alarm Detection

During cluster running, error scenarios can be detected in a timely manner to inform users as soon as possible.

enable_alarm

Parameter description: Enables the alarm detection thread to detect the fault scenarios that may occur in the database.

Type: POSTMASTER

Value range: Boolean

  • on indicates the alarm detection thread can be enabled.
  • off indicates the alarm detection thread cannot be enabled.

Default value: on

connection_alarm_rate

Parameter description: Specifies the ratio restriction that the maximum number of allowed parallel connections to the database. The maximum number of concurrent connections to the database is max_connections x connection_alarm_rate.

Type: SIGHUP

Value range: a floating point number ranging from 0.0 to 1.0

Default value: 0.9

alarm_report_interval

Parameter description: Specifies the interval at which an alarm is reported.

Type: SIGHUP

Value range: a non-negative integer. The unit is second.

Default value: 10

Parent topic: GUC Parameters