GNU Info

(ipc.info)shmlimits

---

Next: Notes Prev: shmctl Up: Shared Memory

---

Enter node , (file) or (file)node

Limits on Shared Memory Resources
---------------------------------

Limits:
   * SHMMNI  max num of shared segments system wide ... 4096.

   * SHMMAX  max shared memory segment size (bytes) ... 4M

   * SHMMIN  min shared memory segment size (bytes).  1 byte (though
     PAGE_SIZE is the effective minimum size).

   * SHMALL  max shared mem system wide (in pages) ... policy.

   * SHMLBA  segment low boundary address multiple.  Must be page
     aligned. SHMLBA = PAGE_SIZE.

Unused or unimplemented:
SHMSEG : maximum number of shared segments per process.