As I posted this I noticed that the other node's CPU is running high on some other cronjobs (every couple of minutes to 60% usage). Is the lack of more CPU cycles a problem in this case?
Robin 2012/1/5 R. Verlangen <ro...@us2.nl> > CPU is idle (< 10% usage). Disk reads occasionally blocks over 32/64K. > Writes around 0-5MB per second. Network traffic 0.1 / 0.1 MB/s (in / out). > Paging 0. System int ~ 1300, csw ~ 2500. > > > 2012/1/5 Philippe <watche...@gmail.com> > >> What can you see in vmstat/dstat ? >> Le 5 janv. 2012 11:58, "R. Verlangen" <ro...@us2.nl> a écrit : >> >> Hi there, >>> >>> I'm running a cassandra 0.8.6 cluster with 2 nodes (in 2 DC's), RF = 2. >>> Actual data on the nodes is only 1GB. Disk latency < 1ms. Disk throughput ~ >>> 0.4MB/s. OS load always below 1 (on a 8 core machine with 16GB ram). >>> >>> When I'm running my writes against the cluster with cl = ONE all reads >>> appear to be faster then the writes. >>> >>> Average write speed = 1600us/operation >>> Average read speed = 200us/operation >>> >>> I'm really wondering why this is the case. Anyone got a clue? >>> >>> With kind regards, >>> Robin >>> >> >
