What to evaluate and consider before adding usage of new third-party crates.
These are not exact requirements but questions to investigate and discuss to help reason around the health, safety, maintainability, and more around crates.
This can also be read as an opinionated guide for crate authors of what our (Embark's) guidelines and recommendations are, though should not be taken too literally.
Legend: 🔒 Must have, ⭐️ Should have, 👍 Nice to have, ℹ️ Info
Under load, the yugabyte clusters showed a latency spike ~ every 30 seconds. Latencies went up to 4 seconds.
Aside from the main problem, we found that one of the servers in the cluster showed CPU saturation during those
spikes. Since the spikes were frequent enough, top could be used to identify the yb-master process as the
I was talking to a coworker recently about general techniques that almost always form the core of any effort to write very fast, down-to-the-metal hot path code on the JVM, and they pointed out that there really isn't a particularly good place to go for this information. It occurred to me that, really, I had more or less picked up all of it by word of mouth and experience, and there just aren't any good reference sources on the topic. So… here's my word of mouth.
This is by no means a comprehensive gist. It's also important to understand that the techniques that I outline in here are not 100% absolute either. Performance on the JVM is an incredibly complicated subject, and while there are rules that almost always hold true, the "almost" remains very salient. Also, for many or even most applications, there will be other techniques that I'm not mentioning which will have a greater impact. JMH, Java Flight Recorder, and a good profiler are your very best friend! Mea