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keepalive_timeout timeout causes high TTFB

July 24, 2015 09:40AM
I am trying to further optimize SSL but if i enable keepalive_timeout i get high TTFB as shown in the report below


When i disable keepalive_timeout , TTFB is fixed but nginx recommand keepalive_timeout : http://nginx.org/en/docs/http/configuring_https_servers.html

Why does this happen ?

I welcome any other advice to further optimise SSL


listen 443 spdy default_server reuseport;
ssl on;
ssl_certificate /etc/ssl/filterbypass.me.crt; #(or .pem)
ssl_certificate_key /etc/ssl/filterbypass.me.key.nopass;
ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
#keepalive_timeout 70;
#ssl_ciphers ECDHE-RSA-AES256-SHA384:AES256-SHA256:RC4:HIGH:!MD5:!aNULL:!eNULL:!NULL:!DH:!EDH:!AESGCM;
ssl_prefer_server_ciphers on;
ssl_buffer_size 8k;
ssl_session_cache shared:SSL:20m;
ssl_dhparam /etc/ssl/dhparam.pem;
ssl_session_timeout 45m;
ssl_stapling on;
ssl_stapling_verify on;
ssl_trusted_certificate /etc/ssl/trustchain.crt;
resolver valid=300s;
resolver_timeout 5s;
add_header Strict-Transport-Security "max-age=31536000; includeSubDomains";
Subject Author Posted

keepalive_timeout timeout causes high TTFB

khav July 24, 2015 09:40AM

Re: keepalive_timeout timeout causes high TTFB

Valentin V. Bartenev July 24, 2015 10:32AM

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