Key Cache Requests ~ Requests missed from memtable ?

Hi, If I have total requests for "Key Cache Requests", does ( Total requests - Key Cache Requests ) indicate requests answered by MemTable alone ? /Girish BK

Memtable HIT ratio ?

Hi, Are there any stats/tools to know how much memtable hits v/s SSTable hits ? /Girish BK

Re: PendingTasks: What does it mean inside Cassandra?

e: > On Wed, Aug 28, 2013 at 5:47 AM, Girish Kumar wrote: > >> When high number of Pending tasks are showing up what it means to >> cassandra? What are the reasons for high number pending tasks? Does that >> mean Cassandra is overloaded ? >> > > It means that

Cassandra SSTable Access Distribution ? How To ?

Hi, I'm trying to get SSTable access distribution for Reads from Cassandra Stress Tool. When I try to dump the cfhistogram I don't see entries in SSTable column. Meaning all turn out to be zero. Any idea what must be going wrong ? Please suggest how to dump the histogram with SSTable access di

PendingTasks: What does it mean inside Cassandra?

Hi, I have this problem of lots of pending tasks in Cassandra when I run Cassandra with higher load. (Cassandra Stress threads set to 384). The tpstat output shows high number Pending tasks > 700. When high number of Pending tasks are showing up what it means to cassandra? What are the reasons f

Large # of Pending Tasks?

Hi, I'm using a single node Cassandra on 24 Core/48GB system. I have set my writers and readers (in yaml) to be around 192 for both and read and write. In this mode, when stressed with 192 threads for inserts and reads, what I observed via the jconsole of 'client request' the active read and wri