Script for stress test memory utilization

[freddy_21]

anybody have script for stress memory utilization. I am learning about PRM, but my memory utilization cant meet with my PRM's configuration.

Thanks
Freddy

[H.Merijn Brand (procura]

Use perl :)

--8<---
#!/usr/bin/perl

use strict;
use warnings;

fork for 1 .. 5;
for (1 .. 10000) {
my $a = "xxxxx" x int rand 1_000_000;
my $b = ~$a;
my $c = reverse $b;
}
-->8---

That should stress mem quite a bit

Enjoy, Have FUN! H.Merijn

[Victor Fridyev]

Hi,

Try this one:
Run some dd commands using as input device different disks:

dd if=/dev/dsk/cXXXX of=/dev/null bs=32768k


HTH

[H.Merijn Brand (procura]

That is an IO stress, not a memory stress

I couldn't think of a real memory stress that would not somehow also stress the CPU.

When I used this:
--8<---
use strict;
use warnings;

fork for 1 .. 5;
for (1 .. 10000) {
my $a = "xxxx" x 10_000_000;
my $b = reverse $a;
}
-->8---

Memory started sky-rocketing, and the system started swapping. You would need to find the point where the system doesn't swap (yet)

Enjoy, Have FUN! H.Merijn

[H.Merijn Brand (procura]

That is an IO stress, not a memory stress

I couldn't think of a real memory stress that would not somehow also stress the CPU.

When I used this:
--8<---
use strict;
use warnings;

fork for 1 .. 5;
for (1 .. 10000) {
my $a = "xxxx" x 10_000_000;
my $b = reverse $a;
}
-->8---

Memory started sky-rocketing, and the system started swapping. You would need to find the point where the system doesn't swap (yet)

Enjoy, Have FUN! H.Merijn

[freddy_21]

i already test with that script. The script worked with perfect... Thanks