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[16:06:39] <apsmith>	 @zhuyifei1999_ - thanks, I'll have to look into strace. The access log doesn't look like it's being "flooded" with only a handful of requests per minute, but maybe that's enough to overwhelm it. The error.log file does show the server occasionally saying "all handlers ... are down" or "backend is overloaded; we'll disable it for 1 seconds and send
[16:06:39] <apsmith>	 the request to another backend instead: reconnects: 1 load: 262 " which sounds ominous.