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[#6625] Global Parameter For VM Allocation To Prevent "Error: cannot allocate vector of size x Gb"

Date:
2019-04-29 16:34
Priority:
3
State:
Open
Submitted by:
JAMES Bowery (jabowery)
Assigned to:
Nobody (None)
Product:
None
Operating System:
None
Component:
None
Summary:
Global Parameter For VM Allocation To Prevent "Error: cannot allocate vector of size x Gb"

Detailed description
When using packages that, in turn, use the Matrix package, it is often difficult to estimate the maximum RAM allocation. This results in possibly days of computation being discarded with the error:

Error: cannot allocate vector of size x Gb

With the understanding that VM can result in paging and corresponding dramatic slowdown, nevertheless a global parameter set at the application level to use VM rather than RAM allocation would avoid this kind of hard failure. The main benefit of this is that the computation can continue while other options for completing the computation successfully are being explored, such as starting the computation in the cloud on a machine with more RAM, without terminating the computation already in progress on the chance that it will complete before the higher capacity computation completes.

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