Support use-but-not-create of notifier socket

[user/henk/code/exim.git] / doc / doc-docbook / spec.xfpt

diff --git a/doc/doc-docbook/spec.xfpt b/doc/doc-docbook/spec.xfpt
index 7c8dee36f148242ca8c34e3fd55d791b9675a71f..cc59230698cd8af1bc59f403923edeaf0fca40e9 100644 (file)
--- a/doc/doc-docbook/spec.xfpt
+++ b/doc/doc-docbook/spec.xfpt
@@ -4397,15 +4397,21 @@ It is only relevant when the &%-bd%& (start listening daemon) option is also
 given.
 Normally the daemon creates this socket, unless a &%-oX%& and &*no*& &%-oP%&
 option is also present.
-If this option is given then the socket will not be created.  This could be
-required if the system is running multiple daemons.
+.new
+If this option is given then the socket will not be created.  This is required
+if the system is running multiple daemons, in which case it should
+be used on all.
+The features supported by the socket will not be available in such cases.
 
 The socket is currently used for
 .ilist
 fast ramp-up of queue runner processes
 .next
+caching compiled regexes
+.next
 obtaining a current queue size
 .endlist
+.wen
 
 .cmdopt -pd
 .cindex "Perl" "starting the interpreter"
@@ -4489,23 +4495,33 @@ every domain. Addresses are routed, local deliveries happen, but no remote
 transports are run.
 
 Performance will be best if the &%queue_run_in_order%& option is false.
-If that is so and the &%queue_fast_ramp%& option is true then
-in the first phase of the run,
+If that is so and
+the &%queue_fast_ramp%& option is true
+and a daemon-notifier socket is available
+then in the first phase of the run,
 once a threshold number of messages are routed for a given host,
 a delivery process is forked in parallel with the rest of the scan.
 
 .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
-complete, a second, normal queue scan happens, with routing and delivery taking
-place as normal. Messages that are routed to the same host should mostly be
+is updated, as if delivery to those hosts had been deferred.
+
+After the first queue scan complete,
+a second, normal queue scan is done, with routing and delivery taking
+place as normal.
+Messages that are routed to the same host should mostly be
 delivered down a single SMTP
 .cindex "SMTP" "passed connection"
 .cindex "SMTP" "multiple deliveries"
 .cindex "multiple SMTP deliveries"
 connection because of the hints that were set up during the first queue scan.
-This option may be useful for hosts that are connected to the Internet
+
+.new
+Two-phase queue runs should be used on systems which, even intermittently,
+have a large queue (such as mailing-list operators).
+They may also be useful for hosts that are connected to the Internet
 intermittently.
+.wen
 
 .vitem &%-q[q]i...%&
 .oindex "&%-qi%&"
@@ -18457,7 +18473,9 @@ acceptable bound from 1024 to 2048.
 .option tls_eccurve main string list&!! &`auto`&
 .cindex TLS "EC cryptography"
 This option selects EC curves for use by Exim when used with OpenSSL.
-It has no effect when Exim is used with GnuTLS.
+It has no effect when Exim is used with GnuTLS
+(the equivalent can be done using a priority string for the
+&%tls_require_ciphers%& option).
 
 After expansion it must contain
 .new