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Full Discussion: sendmails works, but opens 43 file handles per email -> problem
Top Forums UNIX for Advanced & Expert Users sendmails works, but opens 43 file handles per email -> problem Post 302481103 by jim mcnamara on Thursday 16th of December 2010 04:12:16 PM
Old 12-16-2010
Most of those open files are shared libraries. Some are config files.
Every time you execute a command like mailx -s 'subject' user@my.com < filename
you incur the overhead of loading the shared libraries, and config files.

The beauty of shared libraries is that they are usually memory resident, shared among all processes, so you can actually run several sendmail processes concurrently, and not really impact the system more than if you ran a single instance of it.

So, I must be missing something.

try
Code:
ldd sendmail

to see what I mean.
 

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LEARN ABOUT DEBIAN

sendmailconfig

SENDMAILCONFIG(8)					      System Manager's Manual						 SENDMAILCONFIG(8)

NAME

       sendmailconfig - configure sendmail for Debian systems

SYNOPSIS

       sendmailconfig [--no-reload]

DESCRIPTION

       sendmailconfig is used to simplify the configuration of sendmail(8) for use on Debian systems.

       In  the	simplest  case,  you  may  run	this program to (re)configure sendmail for your Debian system at any time. It will modify the file
       /etc/mail/sendmail.mc in order to create a working sendmail configuration which will be written to the file /etc/mail/sendmail.cf.

       For advanced configurations, you can modify the sendmail.mc file before generating sendmail.cf. Future invokations of  sendmailconfig  will
       preserve these changes provided they are made at the end of the file.

       Normally  sendmailconfig  will  ask  if	you want to reload sendmail after making changes to its configuration. The --no-reload option will
       avoid this question.

FILES

       /etc/mail/sendmail.mc
	      sendmail m4 input to generate sendmail.cf

       /etc/mail/sendmail.cf
	      actual sendmail configuration file

       /etc/mail/sendmail.cw
	      names for which we will accept mail in the standard configuration

       /etc/mail/sendmail.ct
	      names of trusted users in the standard configuration

SEE ALSO

       sendmail(8)

AUTHOR

       Robert Leslie <rob@mars.org>

								    21-Jan-1997 						 SENDMAILCONFIG(8)
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