Name
ConnectionCacheTimeout
Synopsis
Maintaining a cached connection to another host (ConnectionCacheSize) imposes a penalty on both the local host and the other host. Each connection means that the other host is running a forked sendmail process (or other MTA) that is either waiting for an SMTP QUIT command to close the connection or for more mail to arrive. The local host has open sockets that consume system resources.
To limit the impact on other hosts, V8 sendmail
offers the ConnectionCacheTimeout
option. This
option tells sendmail how long to wait for
another mail message before closing the connection.
The forms of the ConnectionCacheTimeout
option are
as follows:
O ConnectionCacheTimeout=wait ← configuration file (V8.7 and later) -OConnectionCacheTimeout=wait ← command line (V8.7 and later) define(`confMCI_CACHE_TIMEOUT',wait) ← mc configuration (V8.7 and later) OKwait ← configuration file (V8.6 and later) -oKwait← command line (V8.6 and later)
Optional whitespace can precede the wait
.
The wait
is of type
time and specifies the period to wait before
timing out a cached connection. If this option is entirely missing,
the default (for both the configuration file and the
mc configuration technique) is 300 seconds (five
minutes). When specifying the wait
, be
sure to include a trailing s
character. If you
don’t, the number that you specify is interpreted by
default as a number of minutes. The wait
should never be longer than five minutes. A value of 0 essentially turns off caching. ...
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