Re: Is the default memory region always there ?

Default memory region is always there even if you add more user-defined data regions. If you are not going to use it at all and not happy with the memory still allocated to the default region you can specify a smaller amount of memory allocated for the default region as described here

Is the default memory region always there ?

If I use something like the configuration example from the documentation: | name="dataStorageConfiguration"> class="org.apache.ignite.configuration.DataStorageConfiguration"> class="org.apache.ignite.configuration.DataRegionConfiguration"> value="#{500L * 1024 * 1024}"/> Will