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jps
ver o processo do Bootstrap se for o 14667 por exemplo colocar
jstat -gcutil 14677
-gcutil Option
Summary of Garbage Collection Statistics
Column Description
S0 Survivor space 0 utilization as a percentage of the space's current capacity.
S1 Survivor space 1 utilization as a percentage of the space's current capacity.
E Eden space utilization as a percentage of the space's current capacity.
O Old space utilization as a percentage of the space's current capacity.
P Permanent space utilization as a percentage of the space's current capacity.
YGC Number of young generation GC events.
YGCT Young generation garbage collection time.
FGC Number of full GC events.
FGCT Full garbage collection time.
GCT Total garbage collection time.
Isto vai ler o historico das classes criadas em tempo real no sistema e a memoria ocupada
31849 >> processo
jmap -histo -F 31849
Pagina de Gestão de Memória
https://stackoverflow.com/questions/11339679/100-full-eden-space-0-used-survivor-space-garbage-collection-not-done
-XX:NewRatio=3 - the young generation will occupy 1/4 the overall heap
-XX:NewSize - Calculated automatically if you specify -XX:NewRatio
-XX:MaxNewSize - The largest size the young generation can grow to (unlimited if this value is not specified at command line)
-XX:SurvivorRatio=6
no tomcat so funcionou o 1 e o 4 comando
https://docs.oracle.com/cd/E19900-01/819-4742/abeik/index.html
conf do tomcat do Baco
export CATALINA_OPTS="-Dfile.encoding=UTF-8 -Xmx2048m -Xms2048m -XX:PermSize=256m -XX:MaxPermSize=256m -server -XX:NewRatio=3 -XX:SurvivorRatio=6"