#general
- w
witty-crayon-22786
09/08/2015, 7:37 PM@bored-art-40741: sbt devs report that a 2x slowdown is very unexpected - w
witty-crayon-22786
09/08/2015, 7:37 PMand wonder what sticks out about it - w
witty-crayon-22786
09/08/2015, 7:37 PMi mentioned 300 modules - b
bored-art-40741
09/08/2015, 7:37 PMI wonder if sbt devs deal with anything close to the size that we do - w
witty-crayon-22786
09/08/2015, 7:37 PMno - w
witty-crayon-22786
09/08/2015, 7:38 PMbut they're currently working on extracting the incremental compiler into its own project - w
witty-crayon-22786
09/08/2015, 7:38 PMwhich should allow us to iterate a bit faster there. - b
bored-art-40741
09/08/2015, 7:38 PMThat's handy - b
bored-art-40741
09/08/2015, 7:42 PM@witty-crayon-22786: I've confirmed that for a suspect target that OOMs, its isolated classpath is quite massive - b
bored-art-40741
09/08/2015, 7:43 PMBallpark 1500 isolated dependencies - w
witty-crayon-22786
09/08/2015, 7:43 PM~2000 entries? - w
witty-crayon-22786
09/08/2015, 7:43 PMmm - w
witty-crayon-22786
09/08/2015, 7:43 PMthat still doesn't seem like it would be enough analysis to cause an issue - w
witty-crayon-22786
09/08/2015, 7:43 PMso i wonder - w
witty-crayon-22786
09/08/2015, 7:44 PMif it's reproducible, figuring out what the heap is full of would be great. - w
witty-crayon-22786
09/08/2015, 7:44 PMand to be clear: when you say oom, you mean you get an oom exception, right? or does it hang? - b
bored-art-40741
09/08/2015, 7:44 PMException - b
bored-art-40741
09/08/2015, 7:45 PMIt is not trivially reproducible - b
bored-art-40741
09/08/2015, 7:45 PMWhich also leads me to suspect that it has to do with what's being compiled alongside it - b
bored-art-40741
09/08/2015, 7:54 PMAlso worth noting I suppose that this is jdk8 - b
bored-art-40741
09/08/2015, 7:54 PMDon't see why it would matter though - b
bored-art-40741
09/08/2015, 7:54 PMExcept that old permgen could be robbing our heap - b
bored-art-40741
09/08/2015, 7:55 PMOH - b
bored-art-40741
09/08/2015, 7:55 PMI have a strong suspicion - b
bored-art-40741
09/08/2015, 7:55 PMRight now I'm watching what I think is an OOM about to happen - b
bored-art-40741
09/08/2015, 7:55 PM(It hangs for a while before it happens) - b
bored-art-40741
09/08/2015, 7:56 PMThe process in question has exactly 1.5GB of heap used - b
bored-art-40741
09/08/2015, 7:56 PMWe're passing Xmx 6gb with 4 workers - b
bored-art-40741
09/08/2015, 7:56 PM6 / 4 = 1.5GB - b
bored-art-40741
09/08/2015, 7:57 PMIs the heap somehow being divided up amongst the workers?