something like sar for memory?
ESGLinux
esggrupos at gmail.com
Wed Jul 1 09:23:42 UTC 2009
Hi,
My problem is that I want to know the amount of memory to adjust the
parameters of my Apache y tomcat servers.
without this information I don´t know how to tune them.
ESG
2009/7/1 Geofrey Rainey <Geofrey.Rainey at tvnz.co.nz>
> Linux will always maximize the available memory so you'll generally see
> High usage all the time, this is quite normal.
>
>
>
> -----Original Message-----
> From: redhat-list-bounces at redhat.com [mailto:
> redhat-list-bounces at redhat.com] On Behalf Of ESGLinux
> Sent: Wednesday, 1 July 2009 12:07 a.m.
> To: General Red Hat Linux discussion list
> Subject: Re: something like sar for memory?
>
> Well,
> Now I get the info with sar comes the problem to understand the results.
>
> Allways I try to see the real used memory in linux I have the same problem,
> it seems that it愀 using ALL the memory.
>
> with sar -r:
> kbmemfree kbmemused %memused kbbuffers kbcached kbswpfree
> kbswpused %swpused kbswpcad
> 12:55:01 408540 3740728 90,15 391560 1191012
> 4096200 332 0,01 48
>
> my system has 4GB and it looks it has 3,7G in use, but I don愒 think it愀
> true.
>
> with the free -m command:
>
> free -m
> total used free shared buffers
> cached
> Mem: 4052 3705 346 0 384 1217
> -/+ buffers/cache: 2103 1948
> Swap: 4000 0 4000
>
> the result is the same, but I have heard that the real free memory is the
> in the colum free in the -/+ buffers/cache, is it true?
>
> with vmstat as Manuel suggests:
>
> vmstat -s -S m
> 4248 m total memory
> 3907 m used memory
> 2992 m active memory
> 738 m inactive memory
> 341 m free memory
> 404 m buffer memory
> 1289 m swap cache
> 4194 m total swap
> 0 m used swap
> 4194 m free swap
> ....
>
> what is command I get other results
>
> so how many memory are free on my system :-( ?
>
> ESG
>
>
>
>
>
>
>
>
>
> 2009/6/30 ESGLinux <esggrupos at gmail.com>
>
> > Hi,
> >
> > thanks for your answer, what I was looking for is just sar ;-)
> >
> > Now I feel a bit stupid, I always run sar without parameters and I didn愒
> > realized it could give me the info I was looking for.
> >
> > Thanks again
> >
> > Greetings
> >
> > ESG
> >
> >
> >
> > 2009/6/30 Daniel Carrillo <daniel.carrillo at gmail.com>
> >
> > 2009/6/30 ESGLinux <esggrupos at gmail.com>:
> >> > Hi all,
> >> > I惴 looking for a command or tool that gives a detailed memory usage
> >> across
> >> > time like sar does with CPU,
> >> >
> >> > Do you know something like that?
> >>
> >> sar -r
> >>
> >> man sar
> >>
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> >
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