From 6ad65bbc764e2ca61a6d24a0ebb7884b57c572d0 Mon Sep 17 00:00:00 2001
From: Luca Toscano BalancerMember
.
The DNS domain resolution happens when the socket to
- the origin server is created for the first time.
- When connection pooling is used, the DNS resolution is performed
- again only when the ttl
of the connection expires
- (please check ProxyPass
- parameters).
- This means that httpd does not perform any DNS resolution caching.
+
DNS resolution happens when the socket to
+ the origin domain is created for the first time.
+ When connection pooling is used, each backend domain is resolved
+ only once per child process, and reused for all further connections
+ until the child is recycled. This information should to be considered
+ while planning DNS maintenance tasks involving backend domains.
+ Please also check ProxyPass
+ parameters for more details about connection reuse.