G1GC : Can we use this GC for low heap size

[Bernd Eckenfels]

Hello,

Well its hard to say without knowing the application details and having seen the Gc log. But there is not much you can do besides making the used memory smaller or the heap bigger.

If you upload your gc Logfiles to gceasy and tell site to generate a shareable link you could post it here so we can get some more details to work with.

https://gceasy.io

Gruss
Bernd
--
http://bernd.eckenfels.net

________________________________
Von: mohd shaban <mohdshaban000123 at gmail.com>
Gesendet: Sonntag, Dezember 15, 2019 11:52 AM
An: Bernd Eckenfels
Cc: hotspot-gc-use at openjdk.java.net
Betreff: Re: G1GC : Can we use this GC for low heap size

Hi Bernd,

I have verified there is no memory leak but we are getting this error.
Can you suggest how to fix this issue without increasing the size ?

Thanks,
Mohd Shaban


On Sun, Dec 15, 2019 at 4:09 PM Bernd Eckenfels <ecki at zusammenkunft.net<mailto:ecki at zusammenkunft.net>> wrote:
Hello,

If you get overhead exceeded with default collector (I assume Java 8 Server class aka parallel collector) and small heaps you have a sizing or leak problem, G1 won’t help you there (it might actually make it worse).

Having said that, G1 can also be used for smaller heaps (as can be seen by it beeing default for java9+) but it isn’t that useful, as most of the GC activity should happen with stop the world new collections anyway. ParallelGC with small heaps is the easiest to use IMHO.

Gruß
Bernd

--
https://Bernd.eckenfels.net

________________________________
Von: hotspot-gc-use <hotspot-gc-use-bounces at openjdk.java.net<mailto:hotspot-gc-use-bounces at openjdk.java.net>> im Auftrag von mohd shaban <mohdshaban000123 at gmail.com<mailto:mohdshaban000123 at gmail.com>>
Gesendet: Sonntag, Dezember 15, 2019 11:09 AM
An: hotspot-gc-use at openjdk.java.net<mailto:hotspot-gc-use at openjdk.java.net>
Betreff: G1GC : Can we use this GC for low heap size

Hi Team,

We need help regarding G1GC Algorithm , can we use this GC for low heap size around 1GB or this is only for big heap size.

We want to use this GC because we are getting "GC overhead limit exceeds" and application using the default GC collector

Thanks,
Mohd Shaban
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