https://bugzilla.wikimedia.org/show_bug.cgi?id=51943
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Bug ID: 51943
Summary: Resolve vmem issues in memory limits
Product: Wikimedia Labs
Version: unspecified
Hardware: All
OS: All
Status: NEW
Severity: normal
Priority: Unprioritized
Component: tools
Assignee: [email protected]
Reporter: [email protected]
Classification: Unclassified
Mobile Platform: ---
There are several processes that under linux kernel eats significantly more
vmem than resident memory.
I was looking to find a source of this problem, tested the software on
non-linux kernels, and found that this problem ONLY happens in linux.
For example process X eats 20mb of resident memory but 1800mb of vmem
currently, grid is limiting processes by vmem so these processes has to ask for
this huge amount of ram so they can work, even if in fact they eat only little
resident memory.
This makes grid unusable for processes that need a lot of resident memory,
because for these processes the vmem requirements may go to hundreds of
gigabytes
(for example process that needs 2gb of resident memory, may have 40gb vmem
usage in linux kernel, even if it makes no sense)
There needs to be some workaround so that processes that use non-sense vmem
values can live on grid as well
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