Unix/Linux system process resource limit parameters

The following list contains the single-process resource parameter limits for Unix/Linux systems. The rlimit_core parameter is much used in server development (when core dump is required ).

Code snippet:

                memset(&limit, 0, sizeof(limit)); limit.rlim_cur = RLIM_INFINITY; limit.rlim_max = RLIM_INFINITY; if(setrlimit(RLIMIT_CORE, &limit)) {spd_log(LOG_WARNING, " unable to disable core size res limit %s\n", strerror(errno)); } if(getrlimit(RLIMIT_CORE, &limit)) {spd_log(LOG_WARNING, "unable to check rlimit of fd%s\n", strerror(errno));}

Name	Meaning
Rlimit_as	Maximum memory size available to processes
Rlimit_core	The maximum size of the core file. If it is 0, the core file cannot be created.
Rlimit_cpu	Maximum CPU time (unit: seconds)
Rlimit_data	Maximum Data Segment Size
Rlimit_fsize	Maximum size of the created File
Rlimit_locks	Maximum number of file locks that can be created by a process
Rlimit_memlock	Use mlock to lock the maximum memory size in the process
Rlimit_nofile	Maximum number of files opened in a process
Rlimit_nproc	Maximum number of sub-processes per real User ID
Rlimit_rss	Maximum size of resident storage Zone
Rlimit_sbsize	Maximum Socket buffer size
Rlimit_stack	Maximum stack size
Rlimit_vmem	= Rlimit_as

 

Platform support

Restrictions	FreeBSD 5.2.1	Linux 2.4.22	Mac OS X 10.3	Solaris 9
Rlimit_as	N		N
Rlimit_core
Rlimit_cpu
Rlimit_data
Rlimit_fsize
Rlimit_locks	N		N	N
Rlimit_memlock				N
Rlimit_nofile
Rlimit_nproc				N
Rlimit_rss				N
Rlimit_sbsize		N	N	N
Rlimit_stack
Rlimit_vmem		N	N