Two-phase queue run perf: parallel processes for phase one

[exim.git] / doc / doc-docbook / spec.xfpt

diff --git a/doc/doc-docbook/spec.xfpt b/doc/doc-docbook/spec.xfpt
index 25f97535ad06b3a255f5cd23350dbe05727ab750..410a166abef9847bc9af7b544ff417262f8534e5 100644 (file)
--- a/doc/doc-docbook/spec.xfpt
+++ b/doc/doc-docbook/spec.xfpt
@@ -4510,6 +4510,10 @@ stage, the queue is scanned as if the &%queue_smtp_domains%& option matched
 every domain. Addresses are routed, local deliveries happen, but no remote
 transports are run.
 
+.new
+Performance will be best if the &%queue_run_in_order%& option is false.
+.wen
+
 .cindex "hints database" "remembering routing"
 The hints database that remembers which messages are waiting for specific hosts
 is updated, as if delivery to those hosts had been deferred. After this is