I am getting following alerts:
db.Memtable - setting live ratio to minimum of 10 instead of 0.8951866882910643
What does it really mean? Can I get detailed description?
Memtable live ratio
(10 posts) (3 voices)- Started 1 year ago by mohitanchlia
- Latest reply from zznate
- This topic is not a support question
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This means that the serialized size of the memtable is less than the in-memory size.
This is sort of an exceptional case - can you tell me more about the column family, the data shape, and the work load?
Posted 1 year ago # -
You are correct - hence that logging message being printed at a 'WARN' level as it is an unusual case.
What was the general shape of the data? And did this just flush after being idle for a while or were other things going on?
Was this just a single machine cluster running locally?
Also, what specific version of Cassandra?
Posted 1 year ago # -
To clarify on the above - this is the serialized size of the data in the memtable (in terms of raw bytes) vs. the size of the object graph as the jvm sees it (calculated by JAMM library).
For details on the object graph calculation, see:
https://github.com/jbellis/jammPosted 1 year ago # -
mohitanchlia
MemberIt's C* 1.1. This is a new cluster that I recently built for Production. Yes cluster was under just a test load of few inserts when it showed this warning.
Can you please explain more on this "unusual case"? What's supposed to happen and what might have happened?
Thanks
Posted 1 year ago # -
Anonymous
UnregisteredA great material on a short dress, will surely keep them cool on a summer's evening.
Posted 1 year ago # -
In general, your object graph should not be smaller than the amount of raw bytes. But since this is a brand new cluster, there just may be an edge case in the calculation of the ratio when very little data has been entered. I think this is safe to ignore.
Posted 1 year ago # -
Oh, no, this forum is for community support. For commercial support, see https://support.datastax.com/home if you have an existing account - please ping me directly if you have a contract and you need additional information regarding accessing commercial support resources.
Posted 1 year ago #
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