jetty 8 - Out of Memory : Metaspace with java 8 -

my product has 256 mb of ram. have upgrade java 6 java 8. started facing memory related issue java 8. memory consumption incresing time java 8 same code, memory consumption stable java 6 have explored regarding metaspace,java8 , found below metaspace parameters.

i have tried below combinations , got out of memory error

1.maxmetaspacesize 50m maxmetaspacefreeratio 60m minmetaspacefreeratio 50m

2.maxmetaspacesize 30m

3.maxmetaspacesize 40m

4.maxmetaspacesize 50m

5.maxmetaspacesize 80m

but after 2 3 hours ,outofmemory metaspace error raised.

can explain metaspace options maxmetaspacesize,maxmetaspacefreeratio ,minmetaspacefreeratio are?

how decide right size is? correct combination of these values avoid outofmemory instance in production , reduce memory consumption ?

the issue resolved. found there known issue jaxb.

used stringbuffer instead of string

removed unnecessary instance of jaxbcontext.

refer link

are there memory utlization issue jaxb?