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List: sidewinder
Subject: RE: [Sidewinder] Memory Leaks
From: "Foote-Lennox, Tomo" <tomo_foote-lennox () securecomputing ! com>
Date: 2001-07-31 14:43:41
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Someone wrote to me thinking I had announced a sendmail virus. I know of no
memory leaks or viruses in sendmail.
I was just trying to say that sendmail forks at least four processes every
time it passes a message, so if you are passing a lot of mail, you would
expect to see a lot of processes. The Code Red virus that attacks Microsoft
systems has been really loading down the network with messages lately, so I
expect many firewalls to be more busy than usual. As far as I know,
sendmail kills most of the processes and gives back the extra memory when
the mail flow stops.
Squid uses dynamic memory for caching, so it does not necessarily give back
all the memory when the traffic stops.
Sorry if I caused any confusion.
-----Original Message-----
From: Foote-Lennox, Tomo [mailto:tomo_foote-lennox@securecomputing.com]
Sent: Friday, 2001-July-27 13:57
To: 'Sidewinder@adeptech.com'
Subject: RE: [Sidewinder] Memory Leaks
I am not aware of any leaks in 5.1.1, but you are running Squid; it uses RAM
for caching. As I recall, it is allowed to take a pretty big chunk of RAM.
With the mail viruses flying around, it is also possible that send has open
connections the to places where it is having trouble delivering the mail.
-----Original Message-----
From: Mark Robinson [ mailto:mr@whnt.net <mailto:mr@whnt.net> ]
Sent: Friday, 2001-July-27 11:22
To: Sidewinder
Subject: [Sidewinder] Memory Leaks
Are there any known memory leaks in 5.1.100?
After running server for 10days, 16hrs, free memory was down to 124MB.
There were 191 sleeping and 2 running proccess.
After a reboot, I now have 174 sleeping and 2 running proccess after 2hrs,
57mins, with 259MB free memory.
Major processes are SQUID, MySQL, and sendmail processes.
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<p class=MsoNormal><span class=EmailStyle18><font size=2 color=navy face=Arial><span
style='font-size:10.0pt;mso-bidi-font-size:12.0pt;font-family:Arial'>Someone wrote
to me thinking I had announced a sendmail virus.<span style="mso-spacerun:
yes"> </span>I know of no memory leaks or viruses in \
sendmail.<o:p></o:p></span></font></span></p>
<p class=MsoNormal><span class=EmailStyle18><font size=2 color=navy face=Arial><span
style='font-size:10.0pt;mso-bidi-font-size:12.0pt;font-family:Arial'><![if \
!supportEmptyParas]> <![endif]><o:p></o:p></span></font></span></p>
<p class=MsoNormal><span class=EmailStyle18><font size=2 color=navy face=Arial><span
style='font-size:10.0pt;mso-bidi-font-size:12.0pt;font-family:Arial'>I was just
trying to say that sendmail forks at least four processes every time it passes
a message, so if you are passing a lot of mail, you would expect to see a lot
of processes.<span style="mso-spacerun: yes"> </span>The Code Red virus
that attacks Microsoft systems has been really loading down the network with
messages lately, so I expect many firewalls to be more busy than usual.<span
style="mso-spacerun: yes"> </span>As far as I know, sendmail kills most
of the processes and gives back the extra memory when the mail flow \
stops.<o:p></o:p></span></font></span></p>
<p class=MsoNormal><span class=EmailStyle18><font size=2 color=navy face=Arial><span
style='font-size:10.0pt;mso-bidi-font-size:12.0pt;font-family:Arial'><![if \
!supportEmptyParas]> <![endif]><o:p></o:p></span></font></span></p>
<p class=MsoNormal><span class=EmailStyle18><font size=2 color=navy face=Arial><span
style='font-size:10.0pt;mso-bidi-font-size:12.0pt;font-family:Arial'>Squid uses
dynamic memory for caching, so it does not necessarily give back all the memory
when the traffic stops. <o:p></o:p></span></font></span></p>
<p class=MsoNormal><span class=EmailStyle18><font size=2 color=navy face=Arial><span
style='font-size:10.0pt;mso-bidi-font-size:12.0pt;font-family:Arial'><![if \
!supportEmptyParas]> <![endif]><o:p></o:p></span></font></span></p>
<p class=MsoNormal><span class=EmailStyle18><font size=2 color=navy face=Arial><span
style='font-size:10.0pt;mso-bidi-font-size:12.0pt;font-family:Arial'>Sorry if I
caused any confusion.<o:p></o:p></span></font></span></p>
<p class=MsoNormal><span class=EmailStyle18><font size=2 color=navy face=Arial><span
style='font-size:10.0pt;mso-bidi-font-size:12.0pt;font-family:Arial'><![if \
!supportEmptyParas]> <![endif]><o:p></o:p></span></font></span></p>
<p class=MsoNormal style='margin-left:36.0pt'><font size=2 color=black
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma;color:black'>-----Original
Message-----<br>
<b><span style='font-weight:bold'>From:</span></b> Foote-Lennox, Tomo
[mailto:tomo_foote-lennox@securecomputing.com]<br>
<b><span style='font-weight:bold'>Sent:</span></b> Friday, 2001-July-27 13:57<br>
<b><span style='font-weight:bold'>To:</span></b> 'Sidewinder@adeptech.com'<br>
<b><span style='font-weight:bold'>Subject:</span></b> RE: [Sidewinder] Memory
Leaks</span></font></p>
<p class=MsoNormal style='margin-left:36.0pt'><font size=3
face="Times New Roman"><span style='font-size:12.0pt'><![if \
!supportEmptyParas]> <![endif]><o:p></o:p></span></font></p>
<p style='margin-left:36.0pt'><font size=2 color=black face="Times New Roman"><span
style='font-size:10.0pt;color:black'>I am not aware of any leaks in 5.1.1, but
you are running Squid; it uses RAM for caching. As I recall, it is
allowed to take a pretty big chunk of RAM. With the mail viruses flying
around, it is also possible that send has open connections the to places where
it is having trouble delivering the mail.</span></font><font color=black><span
style='color:black;mso-color-alt:windowtext'><o:p></o:p></span></font></p>
<p style='margin-left:36.0pt'><font size=2 color=black face="Times New Roman"><span
style='font-size:10.0pt;color:black'> -----Original \
Message-----</span></font><font color=black><span style='color:black'> <br>
</span></font><font size=2 color=black><span style='font-size:10.0pt;
color:black'>From: Mark Robinson [<a \
href="mailto:mr@whnt.net">mailto:mr@whnt.net</a>] </span></font><font \
color=black><span style='color:black'><br> </span></font><font size=2 \
color=black><span style='font-size:10.0pt; color:black'>Sent: Friday, \
2001-July-27 11:22</span></font><font color=black><span style='color:black'> <br>
</span></font><font size=2 color=black><span style='font-size:10.0pt;
color:black'>To: Sidewinder</span></font><font
color=black><span style='color:black'> <br>
</span></font><font size=2 color=black><span style='font-size:10.0pt;
color:black'>Subject: [Sidewinder]
Memory Leaks</span></font><font color=black><span style='color:black'> \
</span></font><font color=black><span \
style='color:black;mso-color-alt:windowtext'><o:p></o:p></span></font></p>
<p style='margin-left:36.0pt'><font size=2 color=black face="Times New Roman"><span
style='font-size:10.0pt;color:black'>Are there any known memory leaks in
5.1.100?</span></font><font color=black><span style='color:black'> \
</span></font><font color=black><span \
style='color:black;mso-color-alt:windowtext'><o:p></o:p></span></font></p>
<p style='margin-left:36.0pt'><font size=2 color=black face="Times New Roman"><span
style='font-size:10.0pt;color:black'>After running server for 10days, 16hrs,
free memory was down to 124MB. There were 191 sleeping and 2
running proccess.</span></font><font color=black><span style='color:black;
mso-color-alt:windowtext'><o:p></o:p></span></font></p>
<p style='margin-left:36.0pt'><font size=2 color=black face="Times New Roman"><span
style='font-size:10.0pt;color:black'>After a reboot, I now have 174 sleeping
and 2 running proccess after 2hrs, 57mins, with 259MB free memory.</span></font><font
color=black><span style='color:black'> </span></font><font color=black><span
style='color:black;mso-color-alt:windowtext'><o:p></o:p></span></font></p>
<p style='margin-left:36.0pt'><font size=2 color=black face="Times New Roman"><span
style='font-size:10.0pt;color:black'>Major processes are SQUID, MySQL, and
sendmail processes.</span></font><font color=black><span style='color:black'> \
</span></font><font color=black><span \
style='color:black;mso-color-alt:windowtext'><o:p></o:p></span></font></p>
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