CODEWITHSUNDEEP
javagarbage-collection
Saril Sudhakaran
Saril Sudhakaran

Reputation: 1129

can survivor space full triggers a full gc?

In my tomcat application , I am seeing very frequent full GCs even though the oldgen is not full (atleast 20% free) . I have observed the PS Survivor space 100% utilized most of the time . Can this trigger a full GC ? or can it trigger minor GC ?

Upvotes: 0

Views: 838

Answers (1)

Peter Lawrey
Peter Lawrey

Reputation: 533750

Can this trigger a full GC ?

If the survivour space fills up during a minor GC it triggers a full collection.

or can it trigger minor GC ?

It will only have objects added to it during a minor collection, so the only way is to attempt a full collection.

Most likely you survivor ration is too low.

oldgen is not full (atleast 20% free)

I would suggest your heap should be 50% - 70% free after a full collection to give your application plenty of head room. I tend to have 90+% free after a full GC.

Upvotes: 1

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