What does this message mean in the trace job

I got this message and been waiting and under monitor area i don't see any records coming, last time when i ran i saw 1000 row increments until the job is finished, now second time when i run all i see is zero rows for last 10 minutes npthing is happening:

here is the message:

Cache statistics determined that data flow <DF_STG_SRS_BACDDNP_New> uses <0> caches with a total size of <0> bytes, which is less than (or equal to) the virtual memory <3755999232> bytes available for caches. Data flow will use IN MEMORY cache type.Data flow <DF_BACDDNP_New> using IN MEMORY Cache.

Thanks a lot for the helpful info.