It does appear that if the global concurrentLevel is not set, that it defaults to # CPUs not 4 * # CPUs as documented here https://apacheignite.readme.io/docs/memory-configuration#section-global-configuration-parameters
private long[] calculateFragmentSizes(int concLvl, long cacheSize, long
chpBufSize) {
if (concLvl < 2)
concLvl = Runtime.getRuntime().availableProcessors();
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