Date: Fri, 19 Sep 1997 20:56:20 +0800 From: Peter Wemm <peter@spinner.dialix.com.au> To: "Joseph I. Davida" <jd@slip129-37-223-142.ca.us.ibm.net> Cc: bugs@FreeBSD.ORG Subject: Re: Mem Leak ?? Message-ID: <199709191256.UAA12282@spinner.dialix.com.au> In-Reply-To: Your message of "Thu, 18 Sep 1997 22:11:20 MST." <199709190511.WAA13160@slip129-37-223-142.ca.us.ibm.net>
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"Joseph I. Davida" wrote:
[..]
> When I try to run netscape (version 4.3b8), I get a message
> from netscape that I am out of memory. SO I looked at what
> vmstat was saying:
Most likely you have actually run into the relatively low default resource
limit for data memory allocation per process (32MB I think). Netscape
seems to easily hit this, the communicator version moreso than the lite
version.
> procs memory page disks faults cpu
> r b w avm fre flt re pi po fr sr s0 c0 w0 in sy cs us sy id
> 1 0 0 4033532 21008 13 0 0 0 14 0 1 0 0 166 172 30 1 0 99
> 0 0 0 4029456 21008 2 0 0 0 0 0 0 0 0 113 76 9 0 0 10
0
> 0 0 0 4029812 21008 30 0 0 0 33 0 1 0 0 165 1529 48 3 1 96
> 0 0 0 4029812 21008 13 0 0 0 14 0 1 0 0 109 74 10 0 0 10
0
> 0 0 0 4029812 21008 2 0 0 0 0 0 0 0 0 179 372 55 2 1 97
> 0 0 0 4029812 21008 13 0 0 0 14 0 1 0 0 242 50055 96 16 40 4
4
> 0 0 0 4029812 21008 18 0 0 0 19 0 0 0 0 139 1467 37 3 1 96
>
>
> Holy smokes!! Where did all my free pages go????
>
> Here is the message from bootup, which shows I have plenty of
> free memory. So where did all the mem go??? Is the kernel losing
> track of free'ed up memory? Also, look at output of ps -agxl below
> so you can check resident set sizes.
As I've heard somewhere before, "Free memory is wasted memory". Seriously
though, FreeBSD uses all available memory for disk buffering and data
caching. It's more like 'freeable memory' than 'free memory'. The
problem is that the system doesn't really keep an accurate count of what
is 'in memory but can be dumped instantly'. If you look at the output of
top, you'll see a lot of memory under 'wired', 'cache' and 'buf'. Some of
these are freeable, some not.
Cheers,
-Peter
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