As a general rule, memory and cores isn't that critical as most cases 4 cores is plenty to handle gc duties regardless of memory size. The question should be " how many active threads will there be and what kinds of load will be expected on the host?" and then plan for the load requirements. So for a lightly loaded application 4 CPU's might be enough but 8-16 should be considered as the load goes up ( as well as jdk threads). For good resposiveness monitor CPU and if you see patterns with cpu over 80% then you need more cores.
Vince Ford Sent from mobile > On Aug 9, 2016, at 18:33, Real Wes <thereal...@outlook.com> wrote: > > How’s 12 cores for 64GB and 8 cores for 32GB, given heavy read/ write > activity in a roughly 50/50 ratio, CMSInitiatingOccupancyFraction = ~50 or 60. > >> On Aug 9, 2016, at 5:26 PM, Real Wes <thereal...@outlook.com> wrote: >> >> Do guidelines exist for # cores per 64 GB JVM given an equal ratio of reads/ >> writes with very heavy use? I’m not looking for a precise calculation but >> a finger-in-the-wind recommendation. >> >> No Async Event Queue and no WAN Gateway. >> >> On page 339 of the GemFire 8.2.1 User’s Guide we have: >> >> A 64-bit Sun Java VM 1.6 JVM, with 8 Gb of heap space on an 4 CPU system >> running Linux. >> >> >> Thanks, >> Wes Williams >
