RE: [TCLUG:6265] memory leakage with Apache, Perl CGI, and Samba

[Ben Kochie <ben@nerp.net>]

I have never heard of the swap system slowing down a computer.  I would have to
know a lot more about what you are doing.. but it sounds like it is helping the
system, not slowing it down.

I shouldn't write emails in such a hurry.. I ment to say disk cache, not disk
swap.. *smack himself*

On 03-Jun-99 David Christian wrote:
> Ah.  This explains it.  My next question is this: will this swap system
> slow down the web-server's cgi scripts that require transferring quite a
> bit of data (say 2-3 megs) from another machine via TCP/IP and then
> storing that data in temporary arrays in Perl?
> 
> It seems to run a lot faster in the morning...
> 
> Thanks,
> Dave
> 
> On Thu, 3 Jun 1999, Ben Kochie wrote:
> 
>> I'm not sure of your experience with linux, so I will start at the basics
>> 
>> It is normal for Linux to have no memory free.  Linux has an automatic disk
>> swap system.  it uses un-used memory for disk swap.
>> 
>> Mem:  63216K av, 61692K used,  1524K free, 18212K shrd, 29148K buff
>> Swap: 72256K av,  2888K used, 69368K free               10680K cached
>> 
>> this is a system that has been up for 323 days (output from top)  notice
>> that
>> it uses almost 30MB for buffers.. this is all disk information cached in
>> RAM.
>> 
>> Mem:  127976K av, 124764K used,   3212K free,  36496K shrd,  25572K buff
>> Swap: 128484K av,   6156K used, 122328K free                 47708K cached
>> 
>> this is my system.. up for only one day (damn ICMP bug)  I run gnome,
>> netscape,
>> gimp, xemacs, but I still am using 25MB of ram for disk buffer.
>> 
>> there is no memory leak, it's just wasting ram not doing anything with it.
>> 
>> 
>> On 03-Jun-99 David Christian wrote:
>> > I'm running a Linux box an intranet web server, and so far it's been
>> > working great, except for the fact that it is continuously leaking memory
>> > in one way or another.  When I reboot the machine in the morning (I know!
>> > Sounds like Windoze!)  It is using 22M of RAM in its idle state.
>> >   By the end of the day, it is using 46 out of 48M.  I watch it slowly
>> > creep up over the process of the day, and asking for a particularly large
>> > search using a perhaps sub-optimized perl-script will swallow up a meg of
>> > RAM in one go.
>> > 
>> > I'm also using Samba to allow our HTML guy to edit the pages on the
>> > machine.
>> > 
>> > Can anybody point me towards the culprit or how to find the culprit?  And
>> > if you've seen this before, is there a good solution?  The web gets mighty
>> > slow running entirely on swap.
>> > 
>> > Thanks a bunch!
>> > Dave
>> > 
>> > 
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>> ----------------------------------
>> E-Mail: Ben Kochie <ben@nerp.net>
>> Date: 03-Jun-99
>> Time: 10:35:20
>> 
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E-Mail: Ben Kochie <ben@nerp.net>
Date: 03-Jun-99
Time: 11:04:40

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