Every incident retrospective includes someone asking "what was our MTTR?" And every time, there's a brief awkward pause while people figure out what exactly they're measuring. Did we start the clock when the alert fired, or when the server actually went down? Does it
Nagios has been around since 1999. That's not a dig; it's genuinely impressive. Most software from that era is either dead or unrecognizable, but Nagios is still running in production at thousands of organizations, doing exactly what it was designed to do. There's something
Comparing monitoring tools is a bit like comparing hammers to screwdrivers. You can argue about which one is "better," but the real question is what you're actually trying to do. HetrixTools and FiveNines both call themselves monitoring platforms, but they're solving different problems for
load average: 0.35, 0.42, 0.40 You've seen this line a thousand times. Maybe you glance at it, shrug, and move on to the CPU percentages that seem more useful. Three cryptic decimal numbers don't exactly demand attention, and honestly, nobody explains what they
Most disk failures aren't sudden. The drive doesn't work perfectly on Tuesday and explode on Wednesday. There's usually a warning period: SMART errors accumulating, reallocated sectors ticking upward, I/O latency creeping higher. The problem is that nobody's looking at these signals
Everyone wants 99.999% uptime. It's right there in our company name, so clearly we think it's a worthy goal. But here's the thing: five nines means about 5 minutes of total downtime per year. Not per server, not per service. Total. If your