Cinder
03 / Read latency
Slide data
Cache behavior
In-memory hits erase the long tail.
A small hot set is enough to turn p95 reads from a waiting game into an instant path.
7.9x
faster on warm keys
14M
read sample
P95 READ LATENCY
Four access paths, one clear winner
sample: 14M reads · April 2026
0 ms
5 ms
10 ms
15 ms
20 ms
18.4
ms
Disk read
9.1
ms
Remote cache
2.3
ms
In-memory cache
0.8
ms
Local hot key
7.9x faster
TAIL LATENCY
-87%
when hot keys stay resident
Hot-key residency keeps the working set in memory.