Dear JVM experts, I set -XX:InitiatingHeapOccupancyPercent=70 in JDK8 (no adaptive IHOP feature), but I found there are two initial-mark phase at the beginning of JVM start when HeapOccupancyPercent is far less than 70%, is there any other factor which will trigger G1 GC initial mark phase? Thanks in advance!
*Excerpt of GC log:* 2020-01-22T03:58:14.227+0000: 3.158: [GC pause (Metadata GC Threshold) (young) (initial-mark), 0.1583711 secs] [Eden: 1056.0M(81920.0M)->0.0B(81184.0M) Survivors: 0.0B->736.0M Heap: 1472.0M(160.0G)->1179.5M(160.0G)] 2020-01-22T04:13:07.073+0000: 896.004: [GC pause (G1 Evacuation Pause) (young) (initial-mark), 3.8512514 secs] [Eden: 81184.0M(81184.0M)->0.0B(71904.0M) Survivors: 736.0M->10016.0M Heap: 83643.5M(160.0G)->11744.0M(160.0G)] *JDK version: * openjdk version "1.8.0_222" OpenJDK Runtime Environment (build 1.8.0_222-b10) OpenJDK 64-Bit Server VM (build 25.222-b10, mixed mode) Thanks, Roy
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