ulimit.h(3HEAD) Headers ulimit.h(3HEAD)NAME
ulimit.h, ulimit - ulimit commands
SYNOPSIS
#include <ulimit.h>
DESCRIPTION
The <ulimit.h> header defines the following symbolic constants used by the ulimit() function.
UL_GETFSIZE Get maximum file size.
UL_SETFSIZE Set maximum file size.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Interface Stability |Standard |
+-----------------------------+-----------------------------+
SEE ALSO ulimit(2), attributes(5), standards(5)SunOS 5.10 10 Sep 2004 ulimit.h(3HEAD)
Check Out this Related Man Page
ulimit(2) System Calls ulimit(2)NAME
ulimit - get and set process limits
SYNOPSIS
#include <ulimit.h>
long ulimit(int cmd, /* newlimit */...);
DESCRIPTION
The ulimit() function provides for control over process limits. It is effective in limiting the growth of regular files. Pipes are limited
to PIPE_MAX bytes.
The cmd values, defined in <ulimit.h>, include:
UL_GETFSIZE Return the soft file size limit of the process. The limit is in units of 512-byte blocks and is inherited by child pro-
cesses. Files of any size can be read. The return value is the integer part of the soft file size limit divided by 512. If
the result cannot be represented as a long int, the result is unspecified.
UL_SETFSIZE Set the hard and soft file size limits for output operations of the process to the value of the second argument, taken as a
long int. Any process may decrease its own hard limit, but only a process with appropriate privileges may increase the
limit. The new file size limit is returned. The hard and soft file size limits are set to the specified value multiplied by
512. If the result would overflow an rlimit_t, the actual value set is unspecified.
UL_GMEMLIM Get the maximum possible break value (see brk(2)).
UL_GDESLIM Get the current value of the maximum number of open files per process configured in the system.
RETURN VALUES
Upon successful completion, ulimit() returns the value of the requested limit. Otherwise, -1 is returned, the limit is not changed, and
errno is set to indicate the error.
ERRORS
The ulimit() function will fail if:
EINVAL The cmd argument is not valid.
EPERM A process that has not asserted {PRIV_SYS_RESOURCE} in its effective set is trying to increase its file size limit.
USAGE
Since all return values are permissible in a successful situation, an application wishing to check for error situations should set errno to
0, then call ulimit(), and if it returns -1, check if errno is non-zero.
The getrlimit() and setrlimit() functions provide a more general interface for controlling process limits, and are preferred over ulimit().
See getrlimit(2).
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Interface Stability |Standard |
+-----------------------------+-----------------------------+
SEE ALSO brk(2), getrlimit(2), write(2), attributes(5), privileges(5), standards(5)SunOS 5.11 1 Feb 2003 ulimit(2)
%ulimit -a
nofiles(descriptors) 1024
This means that I can open up to 1024 file per process? But wonder if there is any hardlimit imposed by Solaris 2.6 (eg 255) ?
By the way, is there any tool that can trace which files (or sockets) are opened by a process?
Thanks
DY (5 Replies)
Hi,
I have a Sun machine 5.8 and would like to modify the ulimit parameter for numner of file descriptors.
the output of plimit <process name> is:
4100: process_name
resource current maximum
time(seconds) unlimited unlimited
file(blocks) ... (8 Replies)
Hi there,
I am working on AIX and i dont have permission for /etc/security/limits file.
In the man page of ulimit it is mentioned that it will get the limitations for me from /etc/security/limits file.
the file permission for ulimit command is
-r-xr-xr-x 15 bin bin ... (6 Replies)
hi
what is the difference between file and data? if file is unlimited, does that mean we can have a file as big as we like?
thanks.
file(blocks) unlimited
data(kbytes) 1048576 (6 Replies)
I would like to set the maximum number or open files per process to be greater than 1024000 (for specific application scalability purpose). I am using RHEL 5.3/Ext4.
%sysctl fs.file-max
fs.file-max = 164766821
I also have added the folloing to /etc/security/limits.conf
* ... (7 Replies)
I changed the standard Ulimit sometime back. But when I change it back, the setting does not get updated.
How do I make the change permanent
Waitstejo (7 Replies)
Hi, All
I need to increase the ulimit value permanently without changing /etc/system file. i.e nofiles descriptor.
For all NIS Users logging in.
I know the command to do this:
# ulimit -Sn 4096
This change is temporary.
So, I went on adding this command in the /etc/profile.
... (6 Replies)
Hi im a complete noob to shell commands but here is my problem i have a dedicated server i7 with 24 gig ram i have whm/cpanel on it now ive added a minecraft system to root but i cannot set the server to more than 512mb memory i was told its because the memory is being blocked and was told to... (7 Replies)
I have sparse root solaris-10 zone. I got a request to increase ulimit for a specific user on that zone from 1024 to 8192. Since this is sparse zone, so it doesn't have /etc/system and also I do not want to reboot server.
root@serv_ora1:/# ulimit -a
core file size (blocks, -c) unlimited... (6 Replies)
Hi guys,
i'm a student in IT specially AIX.
I'm from france and i'm not very fluent in english.
My problem is about create an mksysb from a NIM MASTER
0512-005 mksysb: Backup Completed.urred for rootvg.
than thThe backup command completed with errors.
backup: The messages displayed on... (12 Replies)
Hi,
what are the ideal/best/recommended ulimit settings for a root user in AIX?
I understand that it depends on our environment. But I would like to know...what are settings you guys use in your environment for best performance.
default:
fsize = 2097151
core = 2097151
... (8 Replies)
Hello All,
I am having an issue with ellipse environment,
Subscribing ellipse version /opt/mincom/ellipse/bs037__ora_cics_svr
.profile: ulimit: exceeds allowable limit ,
prj -l ellsupp
#ulimit -a
time(seconds) unlimited
file(blocks) unlimited
data(kbytes) unlimited
stack(kbytes) 8192... (22 Replies)
I was trying to generate core dump of a process.But it is not generated.
While digging up the issue I found that Core File Size is set to 0.
I set it with #ulimit -c unlimited.After that I found the core file size is set to 0 (ulimit -a).I exit that session and again logged in.But found the core... (12 Replies)
Hey all,
I'm running apache (cswapache2) on a Solaris 11.3 server.
Recently, if I create a new vhost, the service fails to restart, and enters in maintenance mode.
If I comment lines with log files, the service starts again.
I guess I've reached the limit.
I checked the current values... (8 Replies)