Andrey, thank you! I've seen recommendation to use not much memory (512MB) for heap before and I know, that this was made to reduce GC pauses. I just misunderstood some of recent discussions (can't find it), were I've seen kind of calculations of heap size corresponding to cache. Sorry and thanks.
On Monday, January 5, 2015 1:23:04 PM UTC+5, Andrey Lomakin wrote: > > Hi, > Please do not use huge amount of heap you will achieve nothing but GC stop > the world situation. > We do not use heap a lot, usually 512m or 1GB is good enough for server > installation the rest should put in disk cache. > > On Sat, Jan 3, 2015 at 5:10 PM, <[email protected] <javascript:>> wrote: > >> About second part of my question, it might sound stupid, I know. And I >> see now, that most of GC issues we had are gone (with inner limit, for >> example), but reason I was asking is just because of comments to this >> issue: https://github.com/orientechnologies/orientdb/issues/3318 >> >> >> On Friday, January 2, 2015 2:47:58 PM UTC+5, [email protected] wrote: >>> >>> Dear OrientDB team, are there any rules of thumb on how big heap should >>> be depending on database size? >>> >>> Anyway, I suppose, that low memory should be cause to slower operations, >>> not to GC and OOM issues, am I right? (asking this because series of >>> repeated GCs almost always drove us to the "Timer already cancelled" >>> message and thus - to non-responsive engine) >>> >>> Another question - is there any relation between cache and heap memory >>> sizes. I mean - if we have 64GB of RAM - what is the best proportion >>> between heap and cache sizes should be, could we calculate it (there is a >>> chance, that heap memory should be bigger than some fraction of cache, or >>> vice versa). >>> What about 1GB available - is that scale, or have some special details >>> to consider? >>> >>> Thanks! >>> >> -- >> >> --- >> You received this message because you are subscribed to the Google Groups >> "OrientDB" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected] <javascript:>. >> For more options, visit https://groups.google.com/d/optout. >> > > > > -- > Best regards, > Andrey Lomakin. > > -- --- You received this message because you are subscribed to the Google Groups "OrientDB" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
