Hi Peng, C* periodically saves cache to disk, to solve cold start problem. If row_cache_save_period=0, it means C* does not save cache to disk. But the cache is still working, if it's enabled in table schema, just the cache will be empty after restart.
--Dikang. On Tue, Sep 19, 2017 at 8:27 PM, Peng Xiao <2535...@qq.com> wrote: > And we are using C* 2.1.18. > > > ------------------ Original ------------------ > *From: * "我自己的邮箱";<2535...@qq.com>; > *Date: * Wed, Sep 20, 2017 11:27 AM > *To: * "user"<user@cassandra.apache.org>; > *Subject: * Row Cache hit issue > > Dear All, > > The default row_cache_save_period=0,looks Row Cache does not work in this > situation? > but we can still see the row cache hit. > > Row Cache : entries 202787, size 100 MB, capacity 100 MB, > 3095293 hits, 6796801 requests, 0.455 recent hit rate, 0 save period in > seconds > > Could anyone please explain this? > > Thanks, > Peng Xiao > -- Dikang
