limits(5) - phpMan

getrlimit (2)        - get/set resource limits
limits.conf (5)      - configuration file for the pam_limits module
limits.h (0p)        - implementation-defined constants
pam_limits (8)       - PAM module to limit resources
pcre2limits (3)      - Perl-compatible regular expressions (revised API)
pcrelimits (3)       - Perl-compatible regular expressions
prlimit (1)          - get and set process resource limits
prlimit (2)          - get/set resource limits
prlimit64 (2)        - get/set resource limits
sched_get_priority_max (3p) - get priority limits (REALTIME)
sched_rr_get_interval (3p) - get execution time limits (REALTIME)
setrlimit (2)        - get/set resource limits
ugetrlimit (2)       - get/set resource limits
ulimit (3)           - get and set user limits
ulimit (3p)          - get and set process limits
vlimit (3)           - get/set resource limits