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Questions - g1gc

G1 GC allocated memory is more than heap size

I change GC for application server. Now I use G1 GC. I have 30 GB RAM. For initial testing I set only Xms and Xmx values to be the same 23040 mb. Settings I use: -Xms23040m -Xmx23040m -XX:+UseG1GC...
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grep

java

garbage-collection

jvm

g1gc

java-heap

Votes: 0

Answers: 2

Latest Answer

The allocated size listed in that table includes Metaspace. Metaspace is memory pool separate from the java object heap. Therefore the sum of heap and metaspace can exceed the maximum heap size. [Ed...
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the8472

jvm G1 ，The memory is full， full gc and fail has many many times , then throw OOM , 5min or more, cost a long time ,why?

in my demo project, 69.741: [Full GC (Allocation Failure) 1023M->1023M(1024M), 1.1631632 secs] about 30+ times, then throw OOM, about 1min. the same jvm params, the same code. in my online projec...
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perfect

java

garbage-collection

jvm

g1gc

Votes: 0

Answers: 1

Latest Answer

You are filling up the heap with a ginormous list. The GC tries, and tries, and tries to keep going. But eventually it hits the max heap size and you get an OOME. The reason that the app gets slower...
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Stephen C

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