Redis latency spikes and the Linux kernel: a few more details

from blog antirez, | ↗ original
Today I was testing Redis latency using m3.medium EC2 instances. I was able to replicate the usual latency spikes during BGSAVE, when the process forks, and the child starts saving the dataset on disk. However something was not as expected. The spike did not happened because of disk I/O, nor during the fork() call itself. The test was performed...