If it's physical memory usage (RSS) dropping from 400mb to 100mb when things are going slow, but other memory sizes staying the same (especially if the V8 heap size is still > 100mb), that sounds like maybe your system might be out of total physical memory and a bunch of that process's memory got paged out to slower (swap) memory (although, depending on OS, that may not show up as 100% cpu usage).
On Monday, August 10, 2015 at 1:58:27 PM UTC-7, Mike Roberts wrote: > > I've been having this problem with my production servers, haven't been > able to replicate it with any other environment and it has be scratching my > head daily. > > About every hour or so, any and all requests start taking up 100% cpu and > response times go from 0.5 to around 2 seconds. This happens for anywhere > between a few minutes up to a half an hour. Then it goes back to normal. My > monitoring script requests one page (the same page) per minute, and this > issue can start without any traffic to the server, except for the monitor > that runs the same script over and over. I've even changed the script the > monitor checks and it's the same problem. > > I've found that the node process drops in memory dramatically. It will go > from 400mb to 100mb and this is when the problem starts. No erros shows up > in any of the logs. Again, it happens seemly randomly with nothing > triggering an event, at least I haven't found a trigger. It's getting > fairly annoying because it's only happening in production. I've only been > able to manage the symptoms using clustering, so that only one of the > processes has the issue at a time. > > I'm running 0.12.7 with express and mongoose. > -- Job board: http://jobs.nodejs.org/ New group rules: https://gist.github.com/othiym23/9886289#file-moderation-policy-md Old group rules: https://github.com/joyent/node/wiki/Mailing-List-Posting-Guidelines --- You received this message because you are subscribed to the Google Groups "nodejs" group. To unsubscribe from this group and stop receiving emails from it, send an email to nodejs+unsubscr...@googlegroups.com. To post to this group, send email to nodejs@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/nodejs/00474180-2c98-452f-a17d-18c831315e52%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
