CentOS - Sep 2006 - kbcached tuning on CentOS 4.4

If this is the wrong mailing list (though I doubt it is).  Could someone
please direct me to the right one?  Should this question be directed to
LKML instead?

 

Regards,

 

Justin.

 

  _____  

From: Justin Randall 
Sent: Friday, September 08, 2006 10:31 AM
To: centos at centos.org
Subject: [CentOS] kbcached tuning on CentOS 4

 

Hello,

 

I've been searching to no end at how to tune at what interval (or size)
kbcached will be flushed.

 

I had been chasing a potential memory leak until "sar -r", had
revealed
that all the "mysteriously used" memory was actually being taken up by
the kernel data cache.  It is chewing up all unused memory on the system
slowly over time, which is a concern.  Various sources have pointed me
towards making modification in the /proc/sys/vm file-system although
kernel documentation on the files within doesn't seem to really fit what
I'm trying to do.

 

Any way to set the kbcached buffer to be flushed either at a specified
time interval or once it hits a certain size would be a great help.

 

Thoughts anyone?

 

Thanks,

 

Justin Randall

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Justin Randall wrote:
> If this is the wrong mailing list (though I doubt it is).  Could someone 
> please direct me to the right one?  Should this question be directed to 
> LKML instead?
Justin,

If you bring this question up on LKML, you'll probably be ignored, 
laughed at or you might get some helpful guy who will ask the same 
question as Daniel did: Why is it a concern? Or that person will attempt 
to educate you on how Linux handles memory.

Why is the fact that the Linux kernel will put unused memory to good use 
a concern? It will immediately free up that unused memory when necessary...