Re: Handle Write Heavy Loads in Cassandra 2.0.3

2015-04-22 Thread Brice Dutheil
m*:"Anuj Wadehra" > *Date*:Wed, 22 Apr, 2015 at 6:12 pm > > *Subject*:Re: Handle Write Heavy Loads in Cassandra 2.0.3 > > Thanks Brice for all the comments.. > > We analyzed gc logs and heap dump before tuning JVM n gc. With new JVM > config I specified we were a

Re: Handle Write Heavy Loads in Cassandra 2.0.3

2015-04-22 Thread Anuj Wadehra
ed, 22 Apr, 2015 at 6:12 pm Subject:Re: Handle Write Heavy Loads in Cassandra 2.0.3 Thanks Brice for all the comments.. We analyzed gc logs and heap dump before tuning JVM n gc. With new JVM config I specified we were able to remove promotion failures seen with default config. With Heap dump I g

Re: Handle Write Heavy Loads in Cassandra 2.0.3

2015-04-22 Thread Anuj Wadehra
anks Anuj Wadehra Sent from Yahoo Mail on Android From:"Brice Dutheil" Date:Wed, 22 Apr, 2015 at 3:52 am Subject:Re: Handle Write Heavy Loads in Cassandra 2.0.3 Hi, I cannot really answer your question as some rock solid truth. When we had problems, we did mainly two things Analyz

Re: Handle Write Heavy Loads in Cassandra 2.0.3

2015-04-21 Thread Brice Dutheil
ahoo Mail on Android > <https://overview.mail.yahoo.com/mobile/?.src=Android> > -- > *From*:"Brice Dutheil" > *Date*:Tue, 21 Apr, 2015 at 10:22 pm > > *Subject*:Re: Handle Write Heavy Loads in Cassandra 2.0.3 > > This is an intricate matter, I cannot say for sure what are

Re: Handle Write Heavy Loads in Cassandra 2.0.3

2015-04-21 Thread Anuj Wadehra
il on Android From:"Brice Dutheil" Date:Tue, 21 Apr, 2015 at 10:22 pm Subject:Re: Handle Write Heavy Loads in Cassandra 2.0.3 This is an intricate matter, I cannot say for sure what are good parameters from the wrong ones, too many things changed at once. However there’s many things to

Re: Handle Write Heavy Loads in Cassandra 2.0.3

2015-04-21 Thread Brice Dutheil
com/mobile/?.src=Android> > -- > *From*:"Anuj Wadehra" > *Date*:Mon, 20 Apr, 2015 at 11:51 pm > *Subject*:Re: Handle Write Heavy Loads in Cassandra 2.0.3 > > Small correction: we are making writes in 5 cf an reading frm one at high > speeds. > > >

Re: Handle Write Heavy Loads in Cassandra 2.0.3

2015-04-21 Thread Anuj Wadehra
Any suggestions or comments on this one??  Thanks Anuj Wadhera Sent from Yahoo Mail on Android From:"Anuj Wadehra" Date:Mon, 20 Apr, 2015 at 11:51 pm Subject:Re: Handle Write Heavy Loads in Cassandra 2.0.3 Small correction: we are making writes in 5 cf an reading frm one at hi

Re: Handle Write Heavy Loads in Cassandra 2.0.3

2015-04-20 Thread Anuj Wadehra
Small correction: we are making writes in 5 cf an reading frm one at high speeds.  Thanks Anuj Wadehra Sent from Yahoo Mail on Android From:"Anuj Wadehra" Date:Mon, 20 Apr, 2015 at 7:53 pm Subject:Handle Write Heavy Loads in Cassandra 2.0.3 Hi,   Recently, we discovered that  millions of

Handle Write Heavy Loads in Cassandra 2.0.3

2015-04-20 Thread Anuj Wadehra
Hi,   Recently, we discovered that  millions of mutations were getting dropped on our cluster. Eventually, we solved this problem by increasing the value of memtable_flush_writers from 1 to 3. We usually write 3 CFs simultaneously an one of them has 4 Secondary Indexes.   New changes also includ