How to login to Joomla admin panel without error?

Question

Nginx

There is a site on Joomla 3.4 (freebsd 10, php 5.6, mysql 5.6, nginx 1.8.1) in the materials of about 70,000 articles. While in development, so caching is disabled, when I log into the admin panel for the first time in a day, the standard nginx 50x.html error always appears. I just refresh the page and after a pause ~ 20 seconds, the admin panel loads, and at first we just wait for the connection, and then the interface loads very quickly .
In the future, if you log out and log in again, the admin panel loads without errors, only after a pause. Can you tell me how to optimize this?

Answer 1

Look at the nginx logs immediately after the error.

Answer 2

Here's what's in the log.
2015/05/15 20:19:24 [error] 693#0: *410 upstream timed out (60: Operation timed out) while reading response header from upstream, client: 192.168.1.5, server: localhost, request: "GET /administrator/index.php HTTP/1.1", upstream: "fastcgi://127.0.0.1:9000", host: "192.168.1.7", referrer: " 192.168.1.7/administrator "