max/ideal value of items in limits.conf in rhel5?

pankajd · December 31, 2010, 11:08pm

i want to set limits in /etc/security/limits.conf.My os is rhel 5.2.
It was giving continuous messages in in /var/log/secure like :

continuously.

I have changed values of priority and nice to "0" from unlimited and messages are not comming. But i want to know what is the ideal/maximum value of these two items? Is 0 value set is correct? To what should i set it to? I want it to be maximum.

*       soft            core            unlimited 
*       hard            core            unlimited 
*       soft            data            unlimited
*       hard            data            unlimited
*       soft            fsize           unlimited
*       hard            fsize           unlimited
*       soft            memlock         -1 
*       hard            memlock         -1 
*       soft            nofile          20000
*       hard            nofile          20000
*       soft            rss             unlimited
*       hard            rss             unlimited
*       soft            stack           unlimited
*       hard            stack           unlimited
*       soft            cpu             unlimited
*       hard            cpu             unlimited
*       soft            nproc           unlimited
*       hard            nproc           unlimited
*       soft            as              unlimited
*       hard            as              unlimited
*       soft            maxlogins       unlimited
*       hard            maxlogins       unlimited
*       soft            maxsyslogins    unlimited
*       hard            maxsyslogins    unlimited
*       soft            priority        0
*       hard            priority        0
*       soft            locks           unlimited
*       hard            locks           unlimited
*       soft            sigpending      unlimited
*       hard            sigpending      unlimited
*       soft            msgqueue        unlimited
*       hard            msgqueue        unlimited
*       soft            nice            0
*       hard            nice            0
*       soft            rtprio          unlimited
*       hard            rtprio          unlimited

Lazydog · December 31, 2010, 11:30pm

Have a look at man limit.conf

Neo · January 1, 2011, 12:51am

Reference: LIMITS.CONF(5)

       core
	   limits the core file size \(KB\)

       data
	   maximum data size \(KB\)

       fsize
	   maximum filesize \(KB\)

       memlock
	   maximum locked-in-memory address space \(KB\)

       nofile
	   maximum number of open files

       rss
	   maximum resident set size \(KB\) \(Ignored in Linux 2.4.30 and higher\)

       stack
	   maximum stack size \(KB\)

       cpu
	   maximum CPU time \(minutes\)

       nproc
	   maximum number of processes

       as
	   address space limit \(KB\)

       maxlogins
	   maximum number of logins for this user except for this with uid=0

       maxsyslogins
	   maximum number of logins on system

       priority
	   the priority to run user process with \(negative values boost process priority\)

       locks
	   maximum locked files \(Linux 2.4 and higher\)

       sigpending
	   maximum number of pending signals \(Linux 2.6 and higher\)

       msqqueue
	   maximum memory used by POSIX message queues \(bytes\) \(Linux
	   2.6 and higher\)

       nice
	   maximum nice priority allowed to raise to \(Linux 2.6.12 and higher\) values: [-20,19]

       rtprio
	   maximum realtime priority allowed for non-privileged processes \(Linux 2.6.12 and higher\)

       chroot
	   the directory to chroot the user to

---------- Post updated at 05:51 ---------- Previous update was at 05:47 ----------

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Lazydog · January 1, 2011, 2:57pm

As the MAN page for this topic seems to be self explanatory I see no reason to add anything more to the post other then direct him to the MAN pages on his system. There was never a link to any other page on another website. This is System Administrator 101. If the OP stated that he read the man page but still doesn't understand what to do then it would have been a different story altogether and an explanation would have been in order.