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HP-UX Reference > Ccore_addshmem_write(5)Tunable Kernel ParametersHP-UX 11i Version 2: December 2007 Update |
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NAMEcore_addshmem_write — determines the inclusion of read/write shared memory in process core dump DESCRIPTIONThe core_addshmem_write tunable was added in response to a problem where a customer was limited in debugging a user-level process crash because shared memory segments were not written as part of the core file. Upon core dump, the sections of user memory labeled as shared read-write are written (along with the normal data sections) if this tunable is set to 1 (on), and left out if it is set to 0 (off). When Should the Value of This Tunable Be Raised?When you wish to include read-write shared memory segments in user core files due to debugging needs by developers or maintainers on the system. What Are the Side Effects of Raising the Value?User process core files would increase in most cases (most applications use at least some shared memory). This could be a problem on systems where disk space is at a premium. WARNINGSAll HP-UX kernel tunable parameters are release specific. This parameter may be removed or have its meaning changed in future releases of HP-UX. Installation of optional kernel software, from HP or other vendors, may cause changes to tunable parameter values. After installation, some tunable parameters may no longer be at the default or recommended values. For information about the effects of installation on tunable values, consult the documentation for the kernel software being installed. For information about optional kernel software that was factory installed on your system, see HP-UX Release Notes at http://docs.hp.com. |
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