Sponsored Content
Top Forums UNIX for Dummies Questions & Answers Clearing memory cache on Linux server Post 302809219 by jim mcnamara on Saturday 18th of May 2013 10:42:27 PM
Old 05-18-2013
You have to identify the process with the problem. Then work backwards from there.
Check the user profile set up, ulimit, those sorts of things. Check the code/script/logs for ideas about what that process does. We had a daemon do this because it failed to reap children and process-level active process limit was 256. We saw zombies, so we had a clue. So it was a code problem. fork() fails generally when:

1. there are no free process slots on the system
2. the process tries to exceed some predefined limit on process creation. could be local to the process itself.
3. There is not enough virtual memory - not likely since you have active in-memory caching.



And Red Hat is not one I know well. They made things "different" from other systems, so any advice as to what to tweak would need to come from a Red Hat expert.

Here is a closed to me resource page:
https://access.redhat.com/site/solutions/22105
This User Gave Thanks to jim mcnamara For This Post:
 

10 More Discussions You Might Find Interesting

1. Windows & DOS: Issues & Discussions

Clearing of cache memory

Pls! will someone help me on how to clear my cache memory of my Internet browser Thanks Kayode (3 Replies)
Discussion started by: kayode
3 Replies

2. UNIX for Advanced & Expert Users

Clearing Shared Memory

Hi, I have various applications on my unix server and one of them relies on a process that needs to start in order to print however the process is not starting at all. I think the problem lies in the shared memory. Does anyone have the commands to flush the shared memory and can anyone tell me if... (2 Replies)
Discussion started by: cipfaadmin
2 Replies

3. UNIX for Dummies Questions & Answers

Memory Usage on Linux server

Hi , As I am new to Linux server, I am facing some doubts like: On linux server virtual memory usage goes to 99%, but I have Threshold limit of 95%. So it crossed the threshold limit and alarmd. Yesterday I moniterd the server using TOP command, and found some of Tibco process was consuming... (1 Reply)
Discussion started by: Jaywantmm
1 Replies

4. Linux

Memory Usage on Linux server

Hi , As I am new to Linux server, I am facing some doubts like: On linux server virtual memory usage goes to 99%, but I have Threshold limit of 95%. So it crossed the threshold limit and alarmd. Yesterday I moniterd the server using TOP command, and found some of Tibco process was consuming... (4 Replies)
Discussion started by: Jaywantmm
4 Replies

5. Shell Programming and Scripting

Clearing a defined function from memory

I guess what I mean is: is there something like unalias to clear functions defined by sourcing a script or config/alias file from memory? Is it necessary to start a new terminal session, or can it be done with a command? I tried "function somefunc {}" but bash told me it hit an "unexpected... (0 Replies)
Discussion started by: SilversleevesX
0 Replies

6. UNIX for Dummies Questions & Answers

High use of cache memory

Hi, I'm running a debian lenny 1GB ram, but with a high I/O. This server has 400IOPS and 3MB/s sustain. So, I noted cached memory use 800MB, buffered memory use 50MB, and no free memory is available. Questions: What does mean such a high cached memory? Who's using this cached memory? Is... (3 Replies)
Discussion started by: iga3725
3 Replies

7. UNIX for Advanced & Expert Users

linux memory buffers & cache usage

18:45:47 # free -m total used free shared buffers cached Mem: 96679 95909 770 0 1530 19550 -/+ buffers/cache: 74828 21851 Swap: 12287 652 11635 Hi all. The below output is from a RHEL 4.5... (0 Replies)
Discussion started by: drummerrob
0 Replies

8. Linux

File cache /Page cache Linux

Hi All, could any one point out any open source test-suites for "File cache" testing and as well as performance test suites for the same. Currently my system is up with Linux/ext4. Regards Manish (0 Replies)
Discussion started by: hmanish
0 Replies

9. Red Hat

Need to release Cache memory

Right now i am using Red Hat Enterprise Linux AS release 4 and cache memory occupying around 1.5GB mentioned below, total used free shared buffers cached Mem: 2026 2021 5 0 161 1477 -/+ buffers/cache: 382 1644 ... (4 Replies)
Discussion started by: thakshina
4 Replies

10. Solaris

clear cache memory

hi all, i have noticed that my server has 64 GB RAM and i have application in this server but the server has free memory only 15% and utilized 85% however it didn't eat from swap . does any parameter can be configured in kernel to make the system clear memory from cache like linux i found... (4 Replies)
Discussion started by: maxim42
4 Replies
INITSCRIPT(5)						Linux System Administrator's Manual					     INITSCRIPT(5)

NAME
initscript - script that executes inittab commands. SYNOPSIS
/bin/sh /etc/initscript id runlevels action process DESCRIPTION
When the shell script /etc/initscript is present, init will use it to execute the commands from inittab. This script can be used to set things like ulimit and umask default values for every process. EXAMPLES
This is a sample initscript, which might be installed on your system as /etc/initscript.sample. # # initscript Executed by init(8) for every program it # wants to spawn like this: # # /bin/sh /etc/initscript <id> <level> <action> <process> # # Set umask to safe level, and enable core dumps. umask 022 ulimit -c 2097151 PATH=/bin:/sbin:/usr/bin:/usr/sbin export PATH # Increase the hard file descriptor limit for all processes # to 8192. The soft limit is still 1024, but any unprivileged # process can increase its soft limit up to the hard limit # with "ulimit -Sn xxx" (needs a 2.2.13 or later Linux kernel). ulimit -Hn 8192 # Execute the program. eval exec "$4" NOTES
This script is not meant as startup script for daemons or somesuch. It has nothing to do with a rc.local style script. It's just a handler for things executed from /etc/inittab. Experimenting with this can make your system un(re)bootable. FILES
/etc/inittab, /etc/initscript. AUTHOR
Miquel van Smoorenburg ,<miquels@cistron.nl> SEE ALSO
init(8), inittab(5). July 10, 2003 INITSCRIPT(5)
All times are GMT -4. The time now is 07:30 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy