On Mon, Nov 14, 2022, 4:58 PM Jérôme LELEU <lel...@gmail.com> wrote:
> Hi, > > I have made new tests. > > With the new implementation, I have experienced Redis crashes, but I'm not > sure this is meaningful. > In any case, I have updated to Redis v7 with 500Mo of memory. > I ran into something similar. I think this is mainly due to the large number of operations and tickets and that the redis setup is not exactly tuned to handle the load. > > CAS v6.5 : > Average time node 1: 1 ms > Average time node 2: 1 ms > > CAS v7.0.0 fix REDIS : > Average time node 1: 2 ms > Average time node 2: 2 ms > > While it performs better on CAS v6.5, it now performs very well on CAS v7 > as well. > > Did you change something else in addition to the cache? > Yes I am experimenting with the ticket pattern lookup to not use scanning. This seems to be good enough even without the cache. If you disable the cache altogether on a single node by forcing its capacity to be at 0, (i.e never cache anything) you should see comparable performance numbers. This should fit the scope of 6.6, if we were to backport. I'd like to keep the cache changes in master and continue testing. Cache invalidation can be very tricky here to make sure updates and changes to one ticket on one node is correctly found and processed on another. Given the current caching model is incredibly fast, I'd like to stick to this strategy and work out the other possible issues with clustered setups and event sinks. If I cannot make it work reliably, then I would consider either removing the cache or changing its structure. It would be slower than what it is now, but still very very fast. And if this technique works ok, it might be something to extend to other registry plugins as the need comes up. >>> -- You received this message because you are subscribed to the Google Groups "CAS Developer" group. To unsubscribe from this group and stop receiving emails from it, send an email to cas-dev+unsubscr...@apereo.org. To view this discussion on the web visit https://groups.google.com/a/apereo.org/d/msgid/cas-dev/CAGSBKkfu1sjXEO1MPiq%3DjhhNhce%3DX6gy_LwASdvuMeRtUZ5hfQ%40mail.gmail.com.
