sendmails works, but opens 43 file handles per email -> problem Post: 302481253

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Top Forums UNIX for Advanced & Expert Users sendmails works, but opens 43 file handles per email -> problem Post 302481253 by ZX81 on Friday 17th of December 2010 04:12:39 AM

12-17-2010

Registered User

Hi Jim,
thank you for the information.

> The beauty of shared libraries is that they are usually memory resident, shared among all processes

This is my understanding, too - otherwise lots of processes (not only sendmail) would crash every server. These are the libs used:

[root]# ldd /usr/lib/sendmail
libssl.so.6 => /lib64/libssl.so.6 (0x00002ab174bca000)
libcrypto.so.6 => /lib64/libcrypto.so.6 (0x00002ab174e16000)
libnsl.so.1 => /lib64/libnsl.so.1 (0x00002ab175167000)
libwrap.so.0 => /lib64/libwrap.so.0 (0x00002ab175380000)
libhesiod.so.0 => /usr/lib64/libhesiod.so.0 (0x00002ab175589000)
libcrypt.so.1 => /lib64/libcrypt.so.1 (0x00002ab17578d000)
libdb-4.3.so => /lib64/libdb-4.3.so (0x00002ab1759c6000)
libsasl2.so.2 => /usr/lib64/libsasl2.so.2 (0x00002ab175cbc000)
libldap-2.3.so.0 => /usr/lib64/libldap-2.3.so.0 (0x00002ab175ed5000)
liblber-2.3.so.0 => /usr/lib64/liblber-2.3.so.0 (0x00002ab176110000)
libc.so.6 => /lib64/libc.so.6 (0x00002ab17631e000)
libresolv.so.2 => /lib64/libresolv.so.2 (0x00002ab176675000)
libgssapi_krb5.so.2 => /usr/lib64/libgssapi_krb5.so.2 (0x00002ab17688b000)
libkrb5.so.3 => /usr/lib64/libkrb5.so.3 (0x00002ab176ab9000)
libcom_err.so.2 => /lib64/libcom_err.so.2 (0x00002ab176d4e000)
libk5crypto.so.3 => /usr/lib64/libk5crypto.so.3 (0x00002ab176f51000)
libdl.so.2 => /lib64/libdl.so.2 (0x00002ab177176000)
libz.so.1 => /usr/lib64/libz.so.1 (0x00002ab17737a000)
libpthread.so.0 => /lib64/libpthread.so.0 (0x00002ab17758f000)
/lib64/ld-linux-x86-64.so.2 (0x00002ab17465b000)
libkrb5support.so.0 => /usr/lib64/libkrb5support.so.0 (0x00002ab1777aa000)
libkeyutils.so.1 => /lib64/libkeyutils.so.1 (0x00002ab1779b2000)
libselinux.so.1 => /lib64/libselinux.so.1 (0x00002ab177bb5000)
libsepol.so.1 => /lib64/libsepol.so.1 (0x00002ab177dcd000)

Sendmail is running:

root 28089 0.0 0.0 62812 2320 ? Ss Dec10 0:33 sendmail: accepting connections
smmsp 28097 0.0 0.0 57692 1780 ? Ss Dec10 0:00 sendmail: Queue runner@01:00:00 for /var/spool/clientmqueue

Do you think setting the Sendmail DeliveryMode to 'interactice' would help? I read the sendmail documentation, but I'm still not sure what risks it would involve.

Best,
Andreas

ZX81

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LEARN ABOUT CENTOS

mailstats

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

NAME

       mailstats - display mail statistics

SYNOPSIS

       mailstats [-c] [-o] [-p] [-P] [-C cffile] [-f stfile]

DESCRIPTION

       The mailstats utility displays the current mail statistics.

       First,  the  time  at which statistics started being kept is displayed, in the format specified by ctime(3).  Then, the statistics for each
       mailer are displayed on a single line, each with the following white space separated fields:

	      M 	  The mailer number.
	      msgsfr	  Number of messages from the mailer.
	      bytes_from  Kbytes from the mailer.
	      msgsto	  Number of messages to the mailer.
	      bytes_to	  Kbytes to the mailer.
	      msgsrej	  Number of messages rejected.
	      msgsdis	  Number of messages discarded.
	      msgsqur	  Number of messages quarantined.
	      Mailer	  The name of the mailer.

       After this display, a line totaling the values for all of the mailers is displayed (preceded with a ``T''),  separated  from  the  previous
       information by a line containing only equals (``='') characters.  Another line preceded with a ``C'' lists the number of TCP connections.

       The options are as follows:

       -C     Read the specified file instead of the default sendmail configuration file.

       -c     Try to use submit.cf instead of the default sendmail configuration file.

       -f     Read the specified statistics file instead of the statistics file specified in the sendmail configuration file.

       -P     Output information in program-readable mode without clearing statistics.

       -p     Output information in program-readable mode and clear statistics.

       -o     Don't display the name of the mailer in the output.

       The mailstats utility exits 0 on success, and >0 if an error occurs.

FILES

       /etc/mail/sendmail.cf	The default sendmail configuration file.
       /var/log/mail/statistics The default sendmail statistics file.

SEE ALSO

       mailq(1), sendmail(8)

							   $Date: 2002/06/27 22:47:29 $ 					      MAILSTATS(8)