wsfull memory swap full

[Stephen Withers]

We often run out of swap on our linux kdb server, memory never seems to be freed.
Is there anyway to force Kdb to free memory without restarting it?

[Ryan Hamilton]

Hi Stephen,

What version of kdb are you running? as your options vary a lot depending on version.

We have a tutorial on kdb memory usage that should give you insight into where your memory is being used particularly garbage collection:
http://www.timestored.com/kdb-guides/memory-management#garbage_collection

Example of heap space only being freed after calling the garbage collector:

q)b:10000000?100.
q).Q.w[]`used`heap
134352896 201326592
q)b:1
q).Q.w[]`used`heap
135184 201326592
q).Q.gc[]
134217728
q).Q.w[]`used`heap
135184 67108864


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