Common Shared Memory Issues

• Unix Errors

  • ENOSPC: the kernel setting for the the number of shared memory segments globally is too low.
  • ENOMEM: not enough paging space allocated to accommodate the SGA’s size.

• Oracle Errors:

  • Too many segments needed.
    • Shared memory maximum is too small (shmmax)
    • Maximum number of shared memory segments per process is too small (shmseg)

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