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From Dikang Gu <dikan...@gmail.com>
Subject Re: Row Cache hit issue
Date Wed, 20 Sep 2017 04:05:49 GMT
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 <2535053@qq.com> wrote:

> And we are using C* 2.1.18.
>
>
> ------------------ Original ------------------
> *From: * "我自己的邮箱";<2535053@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

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