Default access_log buffering

[doolli_doug]

I was reading an article on performance on the Nginx site:
https://www.nginx.com/blog/tuning-nginx/ One thing mentioned was enabling
buffering on the access_log. 

However, the directive reference
(http://nginx.org/en/docs/http/ngx_http_log_module.html#access_log) says
that the default buffer size is 64 KB. Does this mean that buffering is
enabled by default, with a size of 64 KB, or that if the buffer is enabled
without a specified size, it will be 64 KB?

Posted at Nginx Forum: http://forum.nginx.org/read.php?2,260630,260630#msg-260630