Variables

$conn_requests the sequence number of current request in the keepalive connection.

$dollar The sign of dollar.

$request_time_msec The request processing time, which is in milliseconds, only used in log_format.

$request_time_usec The request processing time, which is in microseconds, only used in log_format.

$unix_time The current timestamp, it's the current second since the epoch time of Unix.

$year Current year, e.g. 2011.

$year2 Current year, e.g. 11.

$month Current month, e.g. 03, 12.

$day Current day, e.g. 03, 22.

$hour Current hour (24), e.g. 02, 21.

$hour12 Current hour (12), e.g. 02, 09.

$minute Current minute, e.g. 35.

$second Current second, e.g. 12.

$sent_cookie_XXX The cookie value of XXX in the Set-Cookie headers.

$host_comment Host and the timestamp, e.g. “<!-- localhost Thu, 29 Dec 2011 10:10:56 GMT -->”.

$ssl_handshake_time used for monitoring SSL handshake time.