DNS cache settings

You can configure settings for the DNS cache.

Setting
Description
TTL No Error Minimum
Specifies the lower boundary on time-to-live for cache hits.

The default value is 30 seconds.

TTL No Error Maximum
Specifies the upper boundary on time-to-live for cache hits.

The default value is 3600 seconds.

TTL Non-existent Domain Minimum
Specifies the lower boundary on time-to-live for nxdomain.

The default value is 15 seconds.

TTL Non-existent Domain Maximum
Specifies the upper boundary on time-to-live for nxdomain.

The default value is 3600 seconds.

TTL Other Failures Minimum
Specifies the lower boundary on time-to-live for non-nxdomain failures.

The default value is 0 seconds.

TTL Other Failures Maximum
Specifies the upper boundary on time-to-live for non-nxdomain failures.

The default value is 60 seconds.

TTL Lower Limit For Server Failures
Specifies the lower boundary on time-to-live for DNS server failures.

The default value is 300 seconds.

TTL Upper Limit For Server Failures
Specifies the upper boundary on time-to-live for DNS server failures.

The default value is 3600 seconds.

Eager Refresh
Specifies the lead time to refresh cache entries that are nearing expiration.

The default value is 0 seconds.

Cache Entry Limit
Specifies the maximum number of entries that the DNS cache can contain.

The default value is 65536 entries.

Test Ping Delta
Specifies the delta for checking the cbind cluster health.

The default value is 30 seconds.