Two days lost to PHP extension mismatches. A container per service, what the shared-folder performance problem costs on a VM, and whether it was worth it.
A hundred Redis commands issued one at a time cost a hundred network round trips. On the same host that is around a millisecond total; across an availability…
Redis is single-threaded, so a command that takes a long time blocks every other client for that whole time. KEYS * walks the entire keyspace in one command,…