Re: Read operations freeze for a few second while adding a new node

2016-01-28 Thread Anuj Wadehra
Hi Lorand, Do you see any different gc pattern during these 20 seconds? In 2.0.x, memtable create lot of heap pressure. So in a way, reads are not isolated from writes. Frankly speaking, I would have accepted 20 second slowness as scaling is one time activity. But may be your business case doesnt

Re: Read operations freeze for a few second while adding a new node

2016-01-28 Thread Jeff Jirsa
ct: Read operations freeze for a few second while adding a new node Hi, We are struggling with a problem that when adding nodes around 5% read operations freeze (aka time out after 1 second) for a few seconds (10-20 seconds). It might not seems much, but at the order of 200k requests per second

Re: Read operations freeze for a few second while adding a new node

2016-01-28 Thread Jonathan Haddad
If you've got a read heavy workload you should check out http://blakeeggleston.com/cassandra-tuning-the-jvm-for-read-heavy-workloads.html On Thu, Jan 28, 2016 at 8:11 AM Lorand Kasler wrote: > Hi, > > We are struggling with a problem that when adding nodes around 5% read > operations freeze (a

Read operations freeze for a few second while adding a new node

2016-01-28 Thread Lorand Kasler
Hi, We are struggling with a problem that when adding nodes around 5% read operations freeze (aka time out after 1 second) for a few seconds (10-20 seconds). It might not seems much, but at the order of 200k requests per second that's quite big of disruption. It is well documented and known that