kernel 2.4.17 with -rmap VM patch ROCKS!!!

kernel 2.4.17 with -rmap VM patch ROCKS!!!

[Anish Srivastava]

Hi!

I installed kernel 2.4.17 on my SMP server with 8CPU's and 8GB RAM 
and lets just say that whenever the entire physical memory was utilised
the box would topple over...with kswapd running a havoc on CPU utilization
So to avoid losing control I had to reboot every 8 hours.

But, it all changed after I applied Rik van Riels 2.4.17-rmap-11c patch
Now, the box is happily running for the past 3 days under heavy load 
without any problems. The RAM utilization is always at about 95% +
but the system doesnt swap at all.....kswapd is running all the time and 
freeing up main memory for other processes. I am quite happy with the
performance of the box........and highly recommend Rik's patches
for anyone else facing similar problems

Thanks to all you guys for helping me out....

Best regards,

Anish Srivastava

Linux Rulez!!!

Re: kernel 2.4.17 with -rmap VM patch ROCKS!!!

[Andrew Morton]

Anish Srivastava wrote:
> 
> Hi!
> 
> I installed kernel 2.4.17 on my SMP server with 8CPU's and 8GB RAM
> and lets just say that whenever the entire physical memory was utilised
> the box would topple over...with kswapd running a havoc on CPU utilization
> So to avoid losing control I had to reboot every 8 hours.
> 

The fact that the current stable version of the Linux kernel
can only achieve an eight-hour uptime on this class of machine
is a fairly serious problem, don't we all agree?

We need a fix for 2.4.18.

Did you test the -aa patches?

-

Re: kernel 2.4.17 with -rmap VM patch ROCKS!!!

[Anish Srivastava]

> The fact that the current stable version of the Linux kernel
> can only achieve an eight-hour uptime on this class of machine
> is a fairly serious problem, don't we all agree?
> 
> We need a fix for 2.4.18.
> 
> Did you test the -aa patches?
 
No, I havent tried the aa patches. I belive the aa patches are to be 
integrated in the 2.4.18 official stable release.

Since I am quite happy with the performance of my machine with 
the rmap patch......I will leave it as it is. Though, for your information 
I will be checking out the aa patches on my backup machine 
which is also of the same class. I will let you guys know the 
performance with the aa patches incorporated as soon as
I set it up on the other machine.

Regards,
Anish

kernel 2.4.17 with -rmap VM patch ROCKS!!!

[Anish Srivastava]

Hi!
 
 I installed kernel 2.4.17 on my SMP server with 8CPU's and 8GB RAM 
 and lets just say that whenever the entire physical memory was utilised
 the box would topple over...with kswapd running a havoc on CPU utilization
 So to avoid losing control I had to reboot every 8 hours.
 
 But, it all changed after I applied Rik van Riels 2.4.17-rmap-11c patch
 Now, the box is happily running for the past 3 days under heavy load 
 without any problems. The RAM utilization is always at about 95% +
 but the system doesnt swap at all.....kswapd is running all the time and 
 freeing up main memory for other processes. I am quite happy with the
 performance of the box........and highly recommend Rik's patches
 for anyone else facing similar problems
 
 Thanks to all you guys, especially Rik for helping me out....
 
 Best regards,
 
 Anish Srivastava
 
 Linux Rulez!!!
 
 
 

RE: kernel 2.4.17 with -rmap VM patch ROCKS!!!

[Stolle, Martin (KIV)]

Hello,

Thanks for your tip.

I installed 2.4.17-rmap-11c and later 2.4.17-rmap-12a on my
2-CPU-Pentium-III
and on one of my 4-CPU-Xeon-III's, and since then, the machine isn't
swapping any
longer.

I use Informix 7.3 and Oracle 8i.

When i used the standard kernel with informix in former times, i had to
reboot often, if there was much traffic on the machine.

I switched to Andrea's kernel patches, from then I hadn't to reboot, but the
backup
(including database consistency check) took 5 hours, and the swap file was
around 200M,
although there was enough RAM (3G)

According to your idea, i switched to 2.4.17-rmap-series.

I don't have to reboot any more, informix runs well, the backup takes only 1
hour 20 minutes,
there is no swap space any longer used.

Thanks to you and Rik van Riels!

I would like if Rik's kernel patches would go into standard.

They are really well!

Martin
-----Original Message-----
From: Anish Srivastava
To: linux-kernel@vger.kernel.org
Sent: 1/24/2002 12:17 PM
Subject: kernel 2.4.17 with -rmap VM patch ROCKS!!!


Hi!
 
 I installed kernel 2.4.17 on my SMP server with 8CPU's and 8GB RAM 
 and lets just say that whenever the entire physical memory was utilised
 the box would topple over...with kswapd running a havoc on CPU
utilization
 So to avoid losing control I had to reboot every 8 hours.
 
 But, it all changed after I applied Rik van Riels 2.4.17-rmap-11c patch
 Now, the box is happily running for the past 3 days under heavy load 
 without any problems. The RAM utilization is always at about 95% +
 but the system doesnt swap at all.....kswapd is running all the time
and 
 freeing up main memory for other processes. I am quite happy with the
 performance of the box........and highly recommend Rik's patches
 for anyone else facing similar problems
 
 Thanks to all you guys, especially Rik for helping me out....
 
 Best regards,
 
 Anish Srivastava
 
 Linux Rulez!!!
 
 
 


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Re: kernel 2.4.17 with -rmap VM patch ROCKS!!!

[Roland Arendes]

hi Stolle, Martin (KIV),

SMK> I installed 2.4.17-rmap-11c and later 2.4.17-rmap-12a on my
SMK> 2-CPU-Pentium-III
SMK> and on one of my 4-CPU-Xeon-III's, and since then, the machine isn't
SMK> swapping any
SMK> longer.
SMK> Thanks to you and Rik van Riels!
SMK> I would like if Rik's kernel patches would go into standard.
SMK> They are really well!

I can really agree to those statements. It also seems that my
harddrives are more quiet and faster, because the heavy swap-accesses
of the official 2.4.17 are gone.

(It's now even possible to compile a 2.4.17 with -j2 on a SMP system with 64MB
without swap-usage! Yes, it's a lower end system :)

Marcelo: I recommend the rmap12a-patch for the official stable tree. Please
have a look at rmap12a!

-roland