| Name | Data Type | Qualifiers |
| Name | Data Type | Value | Scope | Flavors |
| IovMax | uint64 |
| Description | string | Maximum number of iovec structures that one process has available for use with readv() or writev(). Minimum Acceptable Value: _XOPEN_IOV_MAX(16) sysconf returns this variable when _SC_IOV_MAX is passed to it. | None | TRANSLATABLE= true |
| MqOpenMax | uint64 |
| Description | string | The maximum number of open message queue descriptors a process may hold. Minimum Acceptable Value: _POSIX_MQ_OPEN_MAX(8) sysconf returns this variable when _SC_MQ_OPEN_MAX is passed to it. | None | TRANSLATABLE= true |
| NGroupsMax | uint64 |
| Description | string | Maximum number of simultaneous supplementary group IDs per process. Minimum Acceptable Value: 8 sysconf returns this variable when _SC_NGROUPS_MAX is passed to it. | None | TRANSLATABLE= true |
| OpenMax | uint64 |
| Description | string | Maximum number of files that one process can have open at any one time. Minimum Acceptable Value: 20 sysconf returns this variable when _SC_OPEN_MAX is passed to it. | None | TRANSLATABLE= true |
| PthreadKeysMax | uint64 |
| Description | string | Maximum number of data keys that can be created by a process. Minimum Acceptable Value: _POSIX_THREAD_KEYS_MAX(128) sysconf returns this variable when _SC_THREAD_KEYS_MAX is passed to it. | None | TRANSLATABLE= true |
| PthreadThreadsMax | uint64 |
| Description | string | Maximum number of threads that that can be created per process. Minimum Acceptable Value: _POSIX_THREAD_THREADS_MAX(64) sysconf returns this variable when _SC_THREAD_THREADS_MAX is passed to it. | None | TRANSLATABLE= true |
| SegqueueMax | uint64 |
| Description | string | Maximum number of queued signals that a process may send and have pending at the receiver(s) at any time. Minimum Acceptable Value: _POSIX_SIGQUEUE_MAX(32) sysconf returns this variable when _SC_SIGQUEUE_MAX is passed to it. | None | TRANSLATABLE= true |
| SemNsemsMax | uint64 |
| Description | string | Maximum number of semaphores that a process may have. Minimum Acceptable Value: _POSIX_SEM_NSEMS_MAX(256) sysconf returns this variable when _SC_SEM_NSEMS_MAX is passed to it. | None | TRANSLATABLE= true |
| StreamMax | uint64 |
| Description | string | The number of streams that one process can have open at one time. If defined, it has the same value as {FOPEN_MAX} (see <stdio.h>). Minimum Acceptable Value: _POSIX_STREAM_MAX(8) sysconf returns this variable when _SC_STREAM_MAX is passed to it. | None | TRANSLATABLE= true |
| TimerMax | uint64 |
| Description | string | Maximum number of timers per-process supported by the implementation. Minimum Acceptable Value: _POSIX_TIMER_MAX(32) sysconf returns this variable when _SC_TIMER_MAX is passed to it. | None | TRANSLATABLE= true |