Configure kCluster | Set Xk and Xp values
Configuring the pCluster
Specify the pCluster and pCluster overflow sizes using the -Xp command-line option:
-Xp sizeClusterKB[,sizeOverflowKB]Here, sizeClusterKB specifies the size of the initial pCluster in KB and sizeOverflowKB optionally specifies the size of overflow (subsequent) pClusters in KB. The default values of sizeCluster and sizeOverflow are 16 KB and 2 KB, respectively. If your application suffers from heap fragmentation, turn on the GC trace (-Xtgc2) and specify the -Xk option. If the problem persists, experiment with higher initial pCluster settings and overflow pCluster sizes.