Hi, We're struggling to get our build pipeline working on CircleCI, which has a 4GB RAM limit. Here are some project stats to set the context:
- 1,200+ modules - 36,315 LoC of Haskell - On the local machine with -O1 -j the build takes approx 5.2 GB of RAM [1] Trying to build on CircleCI with -O1 -j fails consistently, as expected. However, the behaviour of -M -j -O1 is erratic, at best. Sometimes it magically works, sometimes it fails. A number of times we've seen GHC take 3.5 GB (as reported by `top`), even though the limit was set to 2.5GB. Here are flags that we've tried in various combinations we've tried. None of them is consistent in building / failing: * -O1 * -j * +RTS -M2621440000 -RTS * +RTS -A32m -RTS * +RTS -n2m -RTS What is the **real** behaviour of the -M option? How does it interact with -j and -A? [1] If I'm reading this correctly - https://gist.github.com/saurabhnanda/c8f8654a7f29c1adb753b357b897b5f3#file-building-library-01-txt-L8-L12 -- Saurabh.
_______________________________________________ ghc-devs mailing list ghc-devs@haskell.org http://mail.haskell.org/cgi-bin/mailman/listinfo/ghc-devs
