ulimits max locked memory virtual memory


 
Thread Tools Search this Thread
Operating Systems AIX ulimits max locked memory virtual memory
# 1  
Old 08-12-2008
ulimits max locked memory virtual memory

Hi,
Would any one be so kind to explain me :
are ulimits defined for each user seperately ? When ?
Specialy what is the impact of :
max locked memory
and
virtual memory

on performance of applications for a user.

Many thanks.

PS :
this is what I can see in MAN :
Code:
ulimit [-SHacdflmnpstuv [limit]]
              Provides control over the resources available to the shell and to processes started by it, on systems that allow such control.  The -H and -S options  spec-
              ify  that  the  hard  or soft limit is set for the given resource.  A hard limit cannot be increased once it is set; a soft limit may be increased up to the
              value of the hard limit.  If neither -H nor -S is specified, both the soft and hard limits are set.  The value of limit can be a number in the  unit  speci-
              fied  for  the resource or one of the special values hard, soft, or unlimited, which stand for the current hard limit, the current soft limit, and no limit,
              respectively.  If limit is omitted, the current value of the soft limit of the resource is printed, unless the -H option  is  given.   When  more  than  one
              resource is specified, the limit name and unit are printed before the value.


Last edited by big123456; 08-12-2008 at 05:10 AM..
# 2  
Old 08-12-2008
Quote:
are ulimits defined for each user seperately ?
Only if specified - else they all get the default settings. Usually on AIX root has special limits by default. As I already said in your other thread, have a look into /etc/security/limits or use ulimit -a as the user of interesst on your server under which the applications run.

Quote:
When ?
When opening up a shell or when a process is being started as some user by cron etc..

Quote:
Specialy what is the impact of :
max locked memory
and
virtual memory
Since you said in the other thread you are using AIX, maybe you lookup that at
pSeries and AIX Information Center

Here for the limits:
pSeries and AIX Information Center

And since in your case this is a bit more pointing to AIX, maybe post it in the AIX subforum, ty.
# 3  
Old 08-12-2008
Thank you.
# 4  
Old 08-12-2008
ulimit max locked memory virtual memory

Hi,
Would any one be so kind to explain me :
are ulimits defined for each user seperately ? When ?
Specialy what is the impact of :
max locked memory
and
virtual memory

on performance of applications for a user.

Many thanks.
# 5  
Old 08-12-2008
The ulimits are defined for every user in /etc/security/limits - have a look there, the file structure is pretty obvious.

I hope this helps.

bakunin
# 6  
Old 08-12-2008
I merged the two threads, thanks for alerting me, Zaxxon.

big123456, "post this in the AIX forum" is not an invitation to crosspost or double post, but just the suggestion to put a question where it thematically belongs. In fact posting the same in more than one forum is forbidden by the rules. You are here since 2005 and should know that by now.

Thanks for your consideration.

bakunin
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. AIX

Nmon max and avg for cpu and memory

Hi All, Anyone know how to capture the nmon avg and max cpu and memory for one of the AIX server for Monthly Utilization Report purposes ? Thanks. ---------- Post updated at 05:18 AM ---------- Previous update was at 05:07 AM ---------- if possible use shell script to count or sum... (6 Replies)
Discussion started by: ckwan
6 Replies

2. Hardware

About the max num of physical memory

Can anyone tell me what the max num of physical memery depends? It's the bit number of the data bus? How about the max number of the virtual memory? (1 Reply)
Discussion started by: cateran
1 Replies

3. Solaris

Locked memory issue

One of our project has exceeded its assigned max-memory-locked by 3 times .. The said project is using around 9 gigs as described by rss parameter in prstat -J .. and the max-project-memory parameter has been defined as 3gigs .. is it normal or we are monitoring the project memory usage in wrong... (2 Replies)
Discussion started by: fugitive
2 Replies

4. Solaris

relationship or difference between entitled memory and locked memory

Hello solaris experts, Being new to solaris containers, from Linux, feeling difficulty in understanding certain concepts. Hope somebody can help me here. I understand that, & some questions .... Locked memory -- memory which will not be swapped out at any cause. is this for... (0 Replies)
Discussion started by: thegeek
0 Replies

5. Solaris

restrcit physical memory with zone.max-locked-memory

Is it possible to restrict physical memory in solaris zone with zone.max-locked-memory just like we can do with rcapd ? I do not want to used rcapd (1 Reply)
Discussion started by: fugitive
1 Replies

6. UNIX for Dummies Questions & Answers

Virtual Memory

Hi, Can anyone please help me workout how much virtual memory I have running on a T2000 running Solaris 10. Thanks # df -h swap 3.5G 1.0M 3.5G 1% /etc/svc/volatile swap 3.5G 208K 3.5G 1% /tmp swap 3.5G 56K ... (2 Replies)
Discussion started by: jamba1
2 Replies

7. UNIX for Dummies Questions & Answers

cpu, memory and virtual memory usage

Hi All, Does anyone know what the best commands in the UNIX command line are for obtaining this info: current CPU usage memory usage virtual memory usage preferably with date and time parameters too? thanks ocelot (4 Replies)
Discussion started by: ocelot
4 Replies

8. HP-UX

Virtual Memory

Hi! I work with HP-UX and I have to monitorize the use of virtual memory for different processes. (java processes for Tibco Adapter) And if these processes exceed a limit send a message to the syslog. I donīt know how to monitorize this... Should I do a script? or use an aplication, for example... (3 Replies)
Discussion started by: Kurohana
3 Replies

9. Programming

about virtual memory and memory leak

Hi, First of all I appreciate this group very much for its informative discussions and posts. Here is my question. I have one process whose virtual memory size increases linearly from 6MB to 12MB in 20 minutes. Does that mean my process has memory leaks? In what cases does the... (4 Replies)
Discussion started by: shriashishpatil
4 Replies

10. UNIX for Dummies Questions & Answers

virtual memory

Hi, can anyone explain me what virtual memory is ( for which we use vmstat commande line ) comparing with RAM ? many thanks before. (2 Replies)
Discussion started by: big123456
2 Replies
Login or Register to Ask a Question