RHEL3 - Clear cached memory?

[Ugo Bellavance]

Andrew Elliott a écrit :
> I was wondering if anyone knew how to free the cached memory for RHEL3
> v.2.4.21-20.  Yes, I am aware that it's better to let the OS manage it and
> that an update/upgrade would fix the issue.
> 
>  
> 
> My question is, HOW do I tune the kernel or vm parameters to allow less
> cached memory.
> 
>  
> 
> As it is now, there is nearly 10GB out of 12GB that are cached and the page
> file is starting to be used.
> 
>  
> 
> Here's a memory snapshot of what I'm talking about.
> 
>  
> 
>  
> 
> Mem:  12271672k av, 11647436k used,  624236k free,       0k shrd,  342228k
> buff
> 
>                    4074008k actv, 5551484k in_d,  833336k in_c
> 
> Swap: 4096312k av,    1352k used, 4094960k free                 10569944k
> cached
> 
>  
> 
> You can't do 'sync; echo 3 > /proc/sys/vm/drop_caches' for RHEL 3...At least
> I don't think so...I don't think there's any /proc/sys/vm/drop_caches in v.
> 3.
> 
>  
> 
> Thanks in advance.

Does it have any impact on performance?  If not, let it alone...