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