I still don't see it in jconsole. BTW, how long would you expect to cost to read a column family of 150000 rows if it fits into row cache entirely? It takes me around 7s now. My experiment is done on a single node.
On Thu, Sep 27, 2012 at 6:00 AM, aaron morton <aa...@thelastpickle.com>wrote: > Set the caching strategy for the CF to be ROWS_ONLY. > > Cheers > > ----------------- > Aaron Morton > Freelance Developer > @aaronmorton > http://www.thelastpickle.com > > On 26/09/2012, at 2:18 PM, Manu Zhang <owenzhang1...@gmail.com> wrote: > > The DEFAULT_CACHING_STRATEGY is Caching.KEYS_ONLY but even configuring row > cache size to be greater zero > won't enable row cache. Why? > > On Wed, Sep 26, 2012 at 9:44 AM, Manu Zhang <owenzhang1...@gmail.com>wrote: > >> I wonder now if "get_range_slices" call will ever look for data in row >> cache. I don't see it in the codebase. Only the "get" call will check row >> cache? >> >> >> On Wed, Sep 26, 2012 at 12:11 AM, Charles Brophy <cbro...@zulily.com>wrote: >> >>> There are settings in cassandra.yaml that will _gradually_ reduce the >>> available cache to zero if you are under constant memory pressure: >>> >>> # Set to 1.0 to disable. <snip> >>> reduce_cache_sizes_at: * >>> reduce_cache_capacity_to: * >>> >>> My experience is that the cache size will not return to the configured >>> size until a service restart if you leave this enabled. The text of this >>> setting is not explicit about the long-term cache shrinkage, so it's easy >>> to think that it will restore the cache to its configured size after the >>> pressures have subsided. It won't. >>> >>> Charles >>> >>> On Tue, Sep 25, 2012 at 8:14 AM, Manu Zhang <owenzhang1...@gmail.com>wrote: >>> >>>> I've enabled row cache and set its capacity to 10MB but when I check >>>> its size in jconsole it's always 0. Isn't it that a row will be written to >>>> row cache if it isn't there when I read the row? I've bulk loaded the data >>>> into disk so row cache is crucial to the performance. >>> >>> >>> >> > >
