#13288: Resident set size exceeds +RTS -M limit with large nurseries -------------------------------------+------------------------------------- Reporter: j6carey | Owner: (none) Type: bug | Status: patch Priority: normal | Milestone: 8.2.1 Component: Runtime System | Version: 8.0.2 Resolution: | Keywords: Operating System: Linux | Architecture: x86_64 Type of failure: Runtime | (amd64) performance bug | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Phab:D3143 Wiki Page: | -------------------------------------+------------------------------------- Comment (by j6carey): Thank you for committing this fix. We still see RSS growth beyond the -M limit, but that is due to having a large number of partially-used megablocks involved in the free block group list. They cannot be returned to the operating system because they are still partly in use, and yet their free space is not counted as heap size, and therefore is not limited by -M. We have not yet figured out why there is such high fragmentation in our application. But clearly that is a distinct issue. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13288#comment:5 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler