incubator-cassandra-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Peter Schuller <>
Subject Re: flush_largest_memtables_at messages in 7.4
Date Wed, 13 Apr 2011 05:23:18 GMT
> Does it really matter how long cassandra has been running? I thought it will
> keep keys of 1M at least.

It will keep up to the limit, and it will save caches periodically and
reload them on start. But the cache needs to be populated by traffic
first. If you wrote a bunch of data, enabled the row cache, and began
reading you have to first wait for population of the cache prior to
looking at cache locality.

Note that the saving of caches is periodic and if you were constantly
restarting nodes during testing maybe it never got saved with the full
set of keys.

> Regarding your previous question about queue size in iostat I see it ranging
> from 114-300.


/ Peter Schuller

View raw message