On Fri, Feb 3, 2012 at 8:46 AM, Jonathan Ellis <jbel...@gmail.com> wrote: > You should come up with a way to reproduce so we can fix it. :)
This happens when server is idle for a while with not so much data and then you start a load like 50 write and 50 read requests per sec. We have 4 CF that we write to and then read from. > > On Fri, Feb 3, 2012 at 10:31 AM, Mohit Anchlia <mohitanch...@gmail.com> wrote: >> On Fri, Feb 3, 2012 at 7:32 AM, Jonathan Ellis <jbel...@gmail.com> wrote: >>> It's a warn because it's nonsense for the JVM to report that an column >>> + overhead, takes less space than just the column data itself. >>> >> >> But is there any action we need to take, or worry about? We trigger >> alerts based on WARN and ERROR. But if there is nothing to do then it >> probably is just an INFO. >>> On Tue, Jan 31, 2012 at 9:41 PM, Mohit Anchlia <mohitanch...@gmail.com> >>> wrote: >>>> I guess this is not really a WARN in that case. >>>> >>>> On Tue, Jan 31, 2012 at 4:29 PM, aaron morton <aa...@thelastpickle.com> >>>> wrote: >>>>> The ratio is the ratio of serialised bytes for a memtable to actual JVM >>>>> allocated memory. Using a ratio below 1 would imply the JVM is using less >>>>> bytes to store the memtable in memory than it takes to store it on disk >>>>> (without compression). >>>>> >>>>> The ceiling for the ratio is 64. >>>>> >>>>> The ratio is calculated periodically so if the workload changes, such as >>>>> system start up, the number will lag behind. I would guess numbers less >>>>> than >>>>> 1 mean the memtable does not have any data. >>>>> >>>>> Cheers >>>>> >>>>> ----------------- >>>>> Aaron Morton >>>>> Freelance Developer >>>>> @aaronmorton >>>>> http://www.thelastpickle.com >>>>> >>>>> On 1/02/2012, at 8:27 AM, Radim Kolar wrote: >>>>> >>>>> >>>>> but a ration of< 1 may occur >>>>> >>>>> for column families with a very high update to insert ratio. >>>>> >>>>> better to ask why minimum ratio is 1.0. What harm can be done with using < >>>>> 1.0 ratio? >>>>> >>>>> >>> >>> >>> >>> -- >>> Jonathan Ellis >>> Project Chair, Apache Cassandra >>> co-founder of DataStax, the source for professional Cassandra support >>> http://www.datastax.com > > > > -- > Jonathan Ellis > Project Chair, Apache Cassandra > co-founder of DataStax, the source for professional Cassandra support > http://www.datastax.com
