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Long GC Pauses


Hi All,

My C cluster configuration.

1) 2 DC with 4 nodes each and Replication Factor of 3 per each DC
2) Writes(Bulk data load) are done to 2nd  DC and Application (reads) are done from 1st DC.
3) CMS GC

Issue : Observing long GC pauses during data load and timeouts from application (reads) during the same time.

Question : 

1)Why am I seeing GC pauses on 1st DC , even though I am using stream_throughput of 16 Mb/s. 
2) Is there any way to reduce the GC pause times other than changing it.

Thanks,



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