Setting cache blocks to false while running an MR Jon serves 2 purposes - it
helps real time requests by not out caches for MR jobs which don't really
need/use them, it helps prevent churn/fragmentation in block cache which helps
GC
There are properties you need to set in hbase-site.xml for tha
Can you describe your setup in more detail? Specifically the amount of heap
hbase region servers have and your GC settings. Is your server swapping when
your MR obs are running? Also do your regions go down or your region servers?
We run many MR jobs simultaneously on our hbase tables (size is i
