01-01-2020
The point is: set a real limit.
"Unlimted" means a process is allowed to consume all system resources. And a buggy/wild/looping process could do so.
This User Gave Thanks to MadeInGermany For This Post:
10 More Discussions You Might Find Interesting
1. AIX
Hi,
I have a query that suppose the first or last name of the user changes and we need to change its userid for aix too. Then in that case how do we handle this scenario??I guess we can't change the user id so we should re-create the new id and associate all the data of the old id. But I donno... (1 Reply)
Discussion started by: tintin@10
1 Replies
2. UNIX for Dummies Questions & Answers
ulimit -a gives the following output:$ulimit -a
time(seconds) unlimited
file(blocks) 2097152
data(kbytes) 131072
stack(kbytes) 16384
memory(kbytes) unlimited
coredump(blocks) 32768
nofiles(descriptors) 400
vmemory(kbytes) 147456
Abot output... (3 Replies)
Discussion started by: nervous
3 Replies
3. AIX
how to set the ulimit on AIX 5.2 version? (3 Replies)
Discussion started by: Shilpi
3 Replies
4. AIX
Hi Guys,
How do I increase the filesize ulimit for user jf01474, using the same value as of user oracle?
Ex: /etc/security/limits
default:
fsize = 4194302
core = 2097151
cpu = -1
data = 262144
rss = 65536
stack = 65536
... (3 Replies)
Discussion started by: sky_lark02
3 Replies
5. HP-UX
Hi,
on HP-UX when I run command
ulimit -a
I get
time(seconds) 4096
file(blocks) unlimited
data(kbytes) 1048576
stack(kbytes) 8192
memory(kbytes) unlimited
coredump(blocks) 4194303
nofiles(descriptors) 4096
Now I want to change
file(blocks) ... (2 Replies)
Discussion started by: namita.mundada
2 Replies
6. UNIX for Dummies Questions & Answers
Hello AIX gurus,
I have a requirement where I have to change user ID of user "myuser" from 100 to 200 and also the group ID of "mygroup" from 2 to 3. Please note that "myuser" has "mygroup" as it's primary group.
What steps do I need to follow for this and in what order? Also can you please... (2 Replies)
Discussion started by: sacguy08
2 Replies
7. AIX
Hello,
How can I setup the ulimit for memory permanent
ulimit -m unlimited
ulimit -a Output from the ulimit command should be similar to the following:time(seconds) unlimited
file(blocks) unlimited
data(kbytes) 2097152
stack(kbytes) 32768... (4 Replies)
Discussion started by: filosophizer
4 Replies
8. UNIX for Dummies Questions & Answers
Hello All,
If a user in AIX is locked due to multiple failed login attempts. How do I find out the IP address from where failed attempts were made?
regards,
Roshni (0 Replies)
Discussion started by: RoshniMehta
0 Replies
9. Red Hat
The root user runs the following
ulimit -a | grep open
and gets a result of
open files (-n) 8162
A user runs the same command and gets a result of
open files (-n) 2500
How can you set the ulimit of the user to... (2 Replies)
Discussion started by: jsanders
2 Replies
10. AIX
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)
Discussion started by: System Admin 77
8 Replies
LEARN ABOUT PHP
posix_getrlimit
POSIX_GETRLIMIT(3) 1 POSIX_GETRLIMIT(3)
posix_getrlimit - Return info about system resource limits
SYNOPSIS
array posix_getrlimit (void )
DESCRIPTION
posix_getrlimit(3) returns an array of information about the current resource's soft and hard limits.
Each resource has an associated soft and hard limit. The soft limit is the value that the kernel enforces for the corresponding resource.
The hard limit acts as a ceiling for the soft limit. An unprivileged process may only set its soft limit to a value from 0 to the hard
limit, and irreversibly lower its hard limit.
RETURN VALUES
Returns an associative array of elements for each limit that is defined. Each limit has a soft and a hard limit.
List of possible limits returned
+-----------+---------------------------------------------------+
|Limit name | |
| | |
| | Limit description |
| | |
+-----------+---------------------------------------------------+
| core | |
| | |
| | The maximum size of the core file. When 0, not |
| | core files are created. When core files are |
| | larger than this size, they will be truncated at |
| | this size. |
| | |
| totalmem | |
| | |
| | The maximum size of the memory of the process, |
| | in bytes. |
| | |
|virtualmem | |
| | |
| | The maximum size of the virtual memory for the |
| | process, in bytes. |
| | |
| data | |
| | |
| | The maximum size of the data segment for the |
| | process, in bytes. |
| | |
| stack | |
| | |
| | The maximum size of the process stack, in bytes. |
| | |
| rss | |
| | |
| | The maximum number of virtual pages resident in |
| | RAM |
| | |
| maxproc | |
| | |
| | The maximum number of processes that can be cre- |
| | ated for the real user ID of the calling process. |
| | |
| memlock | |
| | |
| | The maximum number of bytes of memory that may |
| | be locked into RAM. |
| | |
| cpu | |
| | |
| | The amount of time the process is allowed to use |
| | the CPU. |
| | |
| filesize | |
| | |
| | The maximum size of the data segment for the |
| | process, in bytes. |
| | |
|openfiles | |
| | |
| | One more than the maximum number of open file |
| | descriptors. |
| | |
+-----------+---------------------------------------------------+
EXAMPLES
Example #1
Example use of posix_getrlimit(3)
<?php
$limits = posix_getrlimit();
print_r($limits);
?>
The above example will output something similar to:
Array
(
[soft core] => 0
[hard core] => unlimited
[soft data] => unlimited
[hard data] => unlimited
[soft stack] => 8388608
[hard stack] => unlimited
[soft totalmem] => unlimited
[hard totalmem] => unlimited
[soft rss] => unlimited
[hard rss] => unlimited
[soft maxproc] => unlimited
[hard maxproc] => unlimited
[soft memlock] => unlimited
[hard memlock] => unlimited
[soft cpu] => unlimited
[hard cpu] => unlimited
[soft filesize] => unlimited
[hard filesize] => unlimited
[soft openfiles] => 1024
[hard openfiles] => 1024
)
NOTES
Note
This is a not POSIX function, but is common on BSD and System V systems. If the system does not support this function, then it will
not be included at compile time. This may be checked with function_exists(3).
SEE ALSO
man page GETRLIMIT(2).
PHP Documentation Group POSIX_GETRLIMIT(3)