Coredumps and swap - was part of Solaris Mem Consumption Post: 302223589

Sponsored Content

Operating Systems Solaris Coredumps and swap - was part of Solaris Mem Consumption Post 302223589 by Neo on Sunday 10th of August 2008 12:30:10 PM

08-10-2008

Administrator

I see where I was confused; one writes to rawdisk and other other writes to the filesystem, two different operations.

Thanks for pointing that out (so gently) jlliagre and Perderabo.

So, what jlliagre was saying is that since you must have a place to dump to rawdisk, and this can be the same as swap, you might as well save a partition and use the same one for both swap and dump, if I understand correctly.

That is why jlliagre pushed back a bit against reborgs summary point:

Quote:

You don't need to allocate any swap space to deal with savecores, and have not since Solaris 8.

... because reborg did not mention the raw device dump space, only the savecore space.

I was incorrect in thinking that there was one space, not two. Good discussion, thanks for clarifying.

So, basically what jlliagre gently keep trying to remind me, was that since you must have this raw space, make sure it is the right size and use swap, and the swap space should be big enough to handle a dump.

Is this the same concept for Solaris, HP-UX, Linux, BSD, etc; or does it vary by OS and flavor?

Neo

View Public Profile for Neo

Visit Neo's homepage!

Find all posts by Neo

10 More Discussions You Might Find Interesting

1. Programming

Reg: char ptr - Coredumps

#include <stdio.h> void main() { int Index=1; char *Type=NULL; Type = (char *)Index; printf("%s",Type); } Getting coredump

2. Solaris

Solaris Mem Consumption

We have Sun OS running on spark : SunOS ciniwnpr67 5.10 Generic_118833-24 sun4u sparc SUNW,Sun-Fire-V440 Having Physical RAM : Sol10box # prtconf | grep Mem Memory size: 8192 Megabytes My Top Output is : 130 processes: 129 sleeping, 1 on cpu CPU states: 98.8% idle, 0.2% user, 1.0%...

3. AIX

Zerofault terminates and coredumps - Segmentation fault

Hi, I am using zerofault in AIX to find memory leaks for my server. zf -c <forked-server> zf -l 30 <server> <arguments> Then after some (5 mins ) it terminates core dumping and saying server exited abnormally. I could not understand the core file generated: its something like show in below...

4. Solaris

Solaris 10 - Memory / Swap

Hi all Got myself in a pickle here, chasing my own tail and am confused. Im trying to work out memory / swap on my solaris 10 server, that Im using zones on. Server A has 32Gb of raw memory, ZFS across the root /mirror drives. # prtdiag -v | grep mem = Memory size: 32768 Megabytes #...

5. Solaris

Solaris 10 SWAP SPACE

We have a SPARC system which is running on Solaris-9 and Physical memory size is 16GB.We have allocated 32GB SWAP space(2 times of physical memory).But when we use df -h command it shows following output and SWAP space size shows more than our allocated space # df -h Filesystem size used...

6. Shell Programming and Scripting

Determining User Consumption in solaris

Inorder to find the user memory consumption I used the command: prstat -s cpu -a -n 10 But now I want to automate it and want to write the output to a file. How can I write the out put of user name and percentage of consumption alone to an output file.?

7. Solaris

How to check power consumption of Solaris servers ?

hi friends, we are relocating our DC and need to plan out electrical power for the new DC. are there ways i could find the actual power consumption from my current servers ? instead of the product specs.

8. Solaris

Problem with Swap consumption

Hi Experts, I have M4000 server with 132 GB Physical memory. 4 sparse zones are running under this server, which are running multiple applications. I am not getting any pointer, where swap space is getting consumed. Almost 97% of swap space is being used. I checked all /tmp (of zones as well),...

9. Solaris

Swap Solaris 5.10

I have a customers that is getting grid alerts that swap is over 95% utilized. When I do swap -l on the machine I get the following results. $ swap -l swapfile dev swaplo blocks free /swap/swapfile - 16 6291440 6291440 /swap/swapfile2 - 16 8191984...

10. Solaris

Solaris 10 swap device and filesystem

Hi all, Q1) Due to application requirement, i am required to have more swap space. Currently my swap is on a partition with 32GB. I have another partition with 100GB, but it already has a UFS filesystem on it. Can i just swap -d /dev/dsk/current32gb and swap -a /dev/dsk/ufs100gb ? Will...

LEARN ABOUT DEBIAN

vzcalc

vzcalc(8)							    Containers								 vzcalc(8)

NAME

       vzcalc - calculate resource usage of a container

SYNOPSIS

       vzcalc [-v] CTID

DESCRIPTION

       This  utility  displays	the  share  of the host system resources a particular container is using. If the container is running, the current
       usage is displayed. High utilization values (>100%) mean the system is overloaded (or the container has an invalid configuration).

       Current
	      Shows the amount of the resources consumed by the container at a given time.

       Promised
	      Shows the resources soft limit values "promised" for a given container.

       Max    Shows the resources hard limit values "promised" for a given container.

       If the -v option is specified, the following additional information is also displayed:

       Low Mem
	      The part of memory residing at lower addresses and directly accessed by the kernel (only makes sense for 32-bit architectures).

       Total RAM
	      Total memory.

       Mem+Swap
	      Amount of memory available for applications (both RAM and swap space).

       Alloc Mem
	      Standard memory allocations made for applications in a container.  This is a more "virtual" system resource  than  RAM  or  RAM  and
	      swap.

       Num. Proc
	      Number of processes.

OPTIONS

       -v     Display additional information.

EXIT STATUS

       Normally, the exit status is 0. On error, the exit status is 1.

LICENSE

       Copyright (C) 2000-2009, Parallels, Inc. Licensed under GNU GPL.

OpenVZ								    10 Dec 2009 							 vzcalc(8)

10 More Discussions You Might Find Interesting

1. Programming

Reg: char ptr - Coredumps

Discussion started by: vijaysabari

2. Solaris

Solaris Mem Consumption

Discussion started by: rajwinder

3. AIX

Zerofault terminates and coredumps - Segmentation fault

Discussion started by: vivek.gkp

4. Solaris

Solaris 10 - Memory / Swap

Discussion started by: sbk1972