It should never
allow users to log in to it, and it might need to run its own name server daemon.
??? On modern servers where a fast CPU with lots of memory is available, the bottleneck
will likely be disk I/O. Equip the server with many disks spread over many
controllers. Use multiple queue directories (?§11.3 on page 401) or queue groups
(?§11.4 on page 408) to spread the I/O widely over those many disks.
This is the Title of the Book, eMatter Edition
Copyright ?© 2007 O??™Reilly & Associates, Inc. All rights reserved.
430 | Chapter 11: Manage the Queue
11.8.2 From the Command Line
The -q command-line switch, invoked without a time interval argument, is used to
run sendmail in queue-processing mode. In this mode, sendmail processes queues
once and then exits. This mode can be run interactively from the command line or in
the background via cron(8).
Other command-line switches can be combined with -q to refine the way queues are
processed. The -v (verbose) switchcauses sendmail to print information about each
message it is processing, and to process multiple queues sequentially. The -d (debugging)
switchcan be used to produce additional information about the queue. We??™ll
discuss the -v switch as it applies to the queue later in this chapter. Those -d debugging
switches appropriate to the queue can be found in Table 15-3 on page 536.
Pages:
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773