#5143: Soft heap limit flag
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Reporter: simonmar | Owner: simonmar
Type: task | Status: new
Priority: normal | Milestone: 7.2.1
Component: Runtime System | Version: 7.0.3
Keywords: | Testcase:
Blockedby: | Difficulty:
Os: Unknown/Multiple | Blocking:
Architecture: Unknown/Multiple | Failure: None/Unknown
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This came up in discussion on IRC yesterday. The `+RTS -M<size>` flag
does two things:
* it starts tuning the GC to be more frugal as we get closer to `<size>`,
by enabling in-place compaction and making major GC more frequent
(reducing `-F` in effect).
* it stops the system with an out of memory error if memory usages gets
too close to `<size>`
The problem is often you want the first but not the second, because you'd
like to say to the RTS "try to use no more than 2GB, because after that
we're into swap space", but you don't want the program to fail if the
limit is exceeded.
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/5143>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler
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