Re: Memory and caches

2023-11-28 Thread Sébastien Rebecchi
Hello Bowen, Jon, Thank you for your answers. I will continue investigating following your advice, currently there is no performance issue, and we have good HW etc, so probably no need to optimize caches. Have a good day, Sébastien. Le lun. 27 nov. 2023 à 20:00, Jon Haddad a écrit : > I

Re: Memory and caches

2023-11-27 Thread Jon Haddad
I haven't found chunk cache to be particularly useful. It's a fairly small cache that could only help when you're dealing with a small hot dataset. I wouldn't bother increasing memory for it. Key cache can be helpful, but it depends on the workload. I generally recommend optimizing for your

Re: Memory and caches

2023-11-27 Thread Bowen Song via user
Hi Sebastien, What's your goal? Improving cache hit rate purely for the sake of having a higher hit rate is rarely a good goal, because higher cache hit rate doesn't always mean faster operations. Do you have specific issues with performance? If so, can you please tell us more about it?

Memory and caches

2023-11-27 Thread Sébastien Rebecchi
Hello When I use nodetool info, it prints that relevant information Heap Memory (MB) : 14229.31 / 32688.00 Off Heap Memory (MB) : 5390.57 Key Cache : entries 670423, size 100 MiB, capacity 100 MiB, 13152259 hits, 47205855 requests, 0.279 recent hit rate, 14400 save period in