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> ручное обновление по крону
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> Навыки работы с системами багтренинга (Redmine)
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# only second header will be present in response
# not really bug, just how it works

location /only-one-if {
set $true 1;

if ($true) {
add_header X-First 1;

if ($true) {
add_header X-Second 2;

return 204;

> not really bug
> not bug
> really

Ещё и разметка поехавшая.

Новый файрфокс конечно летает, но от него совсем не этого надо.
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As this is the top post if you google for MySQL high CPU usage or load, I'll add an additional answer:

On the 1st of July 2012, a leap second was added to the current UTC-time to compensate for the slowing rotation of the earth due to the tides. When running ntp (or ntpd) this second was added to your computer's/server's clock. MySQLd does not seem to like this extra second on some OS'es, and yields a high CPU load. The quick fix is (as root):

$ /etc/init.d/ntpd stop
$ date -s "`date`"
$ /etc/init.d/ntpd start