000-221 · Question #49
Paging space on a system is almost entirely consumed. What temporary solution can be used to prevent the system from sending SIGKILL to processes while the administrator performs more in- depth…
The correct answer is C. Increase the existing paging space. When AIX paging space is nearly exhausted, increasing the available paging space is the quickest temporary measure to relieve pressure and prevent SIGKILL signals from being sent to processes.
Question
Paging space on a system is almost entirely consumed. What temporary solution can be used to prevent the system from sending SIGKILL to processes while the administrator performs more in- depth problem determination?
Options
- AUse swapon to flush paging space entries to physical memory.
- BUse tuning commands to change the system behavior so it does not terminate processes
- CIncrease the existing paging space.
- DUse tuning commands to set the page space kill threshold to 100%.
How the community answered
(44 responses)- A14% (6)
- B5% (2)
- C73% (32)
- D9% (4)
Why each option
When AIX paging space is nearly exhausted, increasing the available paging space is the quickest temporary measure to relieve pressure and prevent SIGKILL signals from being sent to processes.
The swapon command activates a previously defined paging space device; it does not flush paging space entries back into physical RAM or reclaim already-consumed paging space.
No supported AIX tuning command simply disables process termination outright; doing so without adding capacity would leave the system unable to handle additional memory allocation requests.
Increasing an existing paging space with chps, or activating an additional logical volume with swapon, immediately expands total swap capacity and lowers the utilization percentage below the system kill threshold. This buys time for the administrator to diagnose the root cause without process termination disrupting the investigation.
Setting the page space kill threshold to 100% only delays SIGKILL until paging is completely exhausted; it does not add capacity and removes all remaining safety margin, leaving the system in a more dangerous state than option C.
Concept tested: AIX paging space management and SIGKILL kill threshold
Source: https://www.ibm.com/docs/en/aix/7.3?topic=management-paging-space
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