[infinispan-dev] Eviction maxEntries analysis

Hi all, I ran a few tests to find out what is the actual number of entries held in a cache when certain "maxEntries" param is set for eviction and I store more than maxEntries entries. I tested with HotSpot JDK6 [1], IBM JDK 6,7 [2]. OpenJDK6 seems to have the same results as HotSpot JDK. Results: maxEntries being set -> actual number of entries held in the cache HotSpot JDK: ------------ 2 -> 2 4 -> 4 6 -> 4 8 -> 8 10 -> 8 256 -> 232 300 -> 266 IBM JDK (both 6, 7): -------------------- 2 -> 4 (2 with LIRS) 4 -> 6 (4 with LIRS) 6 -> 10 8 -> 11 (8 with LIRS) 10 -> 13, (8 with LIRS) 300 -> 287, (266 with LIRS) 256 -> 247, (232 with LIRS) I modified one test in ispn-core to do this testing: https://github.com/mgencur/infinispan/commit/837a1c752fa7fbfb3f05738dd873... Any thoughts ? :) [1] java version "1.6.0_21" Java(TM) SE Runtime Environment (build 1.6.0_21-b06) Java HotSpot(TM) 64-Bit Server VM (build 17.0-b16, mixed mode) [2] java version "1.6.0" Java(TM) SE Runtime Environment (build pxi3260sr9fp1-20110208_03(SR9 FP1)) IBM J9 VM (build 2.4, JRE 1.6.0 IBM J9 2.4 Linux x86-32 jvmxi3260sr9-20110203_74623 (JIT enabled, AOT enabled) java version "1.7.0" Java(TM) SE Runtime Environment (build pxi3270-20110827_01) IBM J9 VM (build 2.6, JRE 1.7.0 Linux x86-32 20110810_88604 (JIT enabled, AOT enabled) -- Martin Gencur -- JBoss QE, Enterprise Data Grid Desk phone: +420 532 294 192, ext. 62192