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iOS: 20min `~poll` messages cause server spikes and thundering heard
Number of GETs during the peak minutes:
$ cat /var/log/nginx/access.log|grep -E GET |awk '{print $4}'| cut -d: -f 2,3 | uniq -c|less
190 00:15
183 00:16
650 00:17 <<<
180 00:18
231 00:19
...
197 00:34
213 00:35
152 00:36
660 00:37 <<<
180 00:38
273 00:39
198 00:40
...
233 00:55
205 00:56
686 00:57 <<<
183 00:58
233 00:59
273 01:00