JVM Performance Tuning

while(iAmNotSatisfied){  
   size = defineMinMaxHeapSize();
   ratios =  tuneGenerationRatios();
   alg = selectAppropriateGcAlgorithm();
   testApplication(size, ratios, alg);
   iAmNotSatisfied = analyzeStatistics();
}
More details later...;)

References:
From Vladislav Gangan Software as Craft presentation
Books:
Java Performance Tuning (2nd Edition)
Pro Java EE 5 Performance Management and Optimization
Java Performance

Java HotSpot VM Options

Useful Linux commands

Some Useful Linux Commands