October 2007
Intermediate to advanced
1308 pages
161h 13m
English
Content preview from sendmail, 4th Edition
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Connection Caching
Connection caching improves the performance of SMTP-transported mail. In processing the queue or delivering to a long list of recipients, keeping a few SMTP connections open (just in case another message is for one of those same sites) will improve the speed of transfers. Caching is of greatest benefit on busy mail hub machines but can benefit any machine that sends a great deal of network mail. Table 24-10 lists the options that determine how connections will be cached.
Table 24-10. Options that determine connection caching
|
Option name |
§ |
Description | |
|---|---|---|---|
|
|
|
ConnectionCacheSize on page 987 |
SMTP connection cache size. |
|
|
|
ConnectionCacheTimeout on page 988 |
SMTP connection cache timeout. |
|
|
HostStatusDirectory on page 1037 |
Location of persistent host status. | |
|
|
SingleThreadDelivery on page 1092 |
Set single-threaded delivery. |
Note that beginning with V8.13, the ConnectionCacheSize and
ConnectionCacheTimeout options now also
affect delivery agents that use P=[LPC] for
delivery.
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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