java - Is my JAVA_OPTS setting is fine? -



java - Is my JAVA_OPTS setting is fine? -

i'm tuning jvm application. java_opts set following:

java_opts="$java_opts -dfile.encoding=utf-8" java_opts="$java_opts -server" java_opts="$java_opts -xms2048m" java_opts="$java_opts -xmx2048m" java_opts="$java_opts -xx:newsize=256m" java_opts="$java_opts -xx:maxnewsize=256m" java_opts="$java_opts -xx:permsize=256m" java_opts="$java_opts -xx:maxpermsize=256m"

i understood generations. i'm not sure setting appropriate. far understood, size of new generation 256 , remain(1792m) size of old generation(because perm generation not heap).

am right? , setting appropriate?

the optimal settings average java application are

java_opts=""

or why should java authors specify defaults change.

without knowing application , available memory, there's no point in changing defaults.

actually, -dfile.encoding=utf-8 might create sense if want utilize utf-8 on scheme using else default (but changing os better). forget others, unless know how much memory you'll need (and utilize -xmx , still forget remaining ones).

java garbage-collection java-opts

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