Re: cassandra concurrent read performance problem

2018-05-28 Thread Alain RODRIGUEZ
Hi, Would you share some more context with us? - What Cassandra version do you use? - What is the data size per node? - How much RAM does the hardware have? - Does your client use paging? A few ideas to explore: - Try tracing the query, see what's taking time (and resources) - From the tracing,

cassandra concurrent read performance problem

2018-05-26 Thread onmstester onmstester
By reading 90 partitions concurrently(each having size > 200 MB), My single node Apache Cassandra became unresponsive, no read and write works for almost 10 minutes. I'm using this configs: memtable_allocation_type: offheap_buffers gc: G1GC heap: 128GB concurrent_reads: 128 (having more tha