Swap memory

Thread Tools Search this Thread
Operating Systems Linux Red Hat Swap memory
# 1  
Old 09-25-2013
RedHat Swap memory

Hi team,

Is there any ability to force the system to use the swap memory for a specific service? And prevent another service of using the swap memory?

# 2  
Old 09-25-2013
You can force a process to start out mostly in swap, but if the process runs at all it will wind up in RAM. Running something totally from swap is a bad idea, and if allowed, it results in a real performance drag called thrashing. The swapped process runs 100's of time slower and can seriously degrade the whole system. For every other process on the system.

If you got this idea from seeing how much memory a service is using, you may have misunderstood. A lot of the working set of a process is in shared memory. All processes use this shared memory at the same time. If each of the required system processes (services among them) had nothing but private memory, it likely would have eaten most of system memory before you even logged onto a newly booted box.

You may want to rethink this swap idea.
These 2 Users Gave Thanks to jim mcnamara For This Post:
# 3  
Old 10-14-2013
The operating system allocates swap depending on the process........ We don't need to change it.... Its not recommended........ If you want a particular service to run smoothly, Then change the priorities of the service related processes ( or daemons)
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. Red Hat

SWAP memory

Admins, How can I configure the server so that it will utilize the swap file as little as possible? Please correct me if I'm wrong, I would say change the value of sysctl - vm.swappiness? And if, how can I keep it permenatly even after rebooting the system? since no related parameters in... (7 Replies)
Discussion started by: leo_ultra_leo
7 Replies

2. Linux

Swap memory issue

Hi, In our production box i can see the Swap space using the below command free total used free shared buffers cached Mem: 65963232 41041084 24922148 0 877160 35936292 -/+ buffers/cache: 4227632 61735600 Swap: 4192880 ... (6 Replies)
Discussion started by: ratheeshjulk
6 Replies

3. HP-UX

How much Swap memory do i have ?

here is the output of swapinfo command ==> swapinfo Kb Kb Kb PCT START/ Kb TYPE AVAIL USED FREE USED LIMIT RESERVE PRI NAME dev 8192000 0 8184000 0% 0 - 1 /dev/vg00/swap reserve - 8184000 -8184000 memory ... (5 Replies)
Discussion started by: mohtashims
5 Replies

4. UNIX for Dummies Questions & Answers

Is swap and Shared memory the same ?

In Linux, Unix environments Is swap and Shared memory the same ? In Linux, swap is mounted on /dev/shm ? I am wondering if the naming of 'shm' has anything to do with Shared memory ? (3 Replies)
Discussion started by: kraljic
3 Replies

5. UNIX for Dummies Questions & Answers

Threshold for swap memory

hi guys the monitoring team is using a tool for monitoring linux boxes and they set an alarm for swap memory to 10%(critical) I really has no idea when swap memory usage is high.... Can someone recommend me a threshold for this? when is warning or critical and this parameters can affect... (3 Replies)
Discussion started by: karlochacon
3 Replies

6. UNIX for Advanced & Expert Users

Query regarding swap memory

Hi, Please help explain and answer the below: 1. I need to predetermine how much swap will my JVM use if it is started with -Xms 512M and -Xmx 1024M ? 2. Can a JVM process just use the Heap and not the Swap memory ? 3. If the Total physical RAM on my server is 8 GB and current Heap... (6 Replies)
Discussion started by: mohtashims
6 Replies

7. UNIX for Dummies Questions & Answers

swap memory

Hi, I want to see used swap memory I know that for this there is command free -m but this shows Swap: 16383 4529 11854 by top command while load is 1.05 max CPU % 24 mysqld why used swap shows 4529 either it is not flushed there is other command... (2 Replies)
Discussion started by: kaushik02018
2 Replies

8. 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 #... (1 Reply)
Discussion started by: sbk1972
1 Replies

9. Solaris

swap memory

Hi Can any help me on setting the swap memory ? I would like to set swap memory for installing oracle 9i software. RAM - 512 Mb HDD - 40 Gb OS - Sun Solaris 5.9 (6 Replies)
Discussion started by: sivaramat
6 Replies

10. Filesystems, Disks and Memory

Total Memory/Swap Memory

I need to put a program together to determine the total, available memory and total and available swap on unix machines. I have been searching for weeks and I seem to run into dead ends. Every unix platform I look at has a different way to determine memory info. Any sugggestions or new... (4 Replies)
Discussion started by: ghe1
4 Replies
Login or Register to Ask a Question