Redis connection slow from PHP

问题

I just started using Redis in my application, but for some reason the initial connection to the Redis server from PHP takes almost exactly 1 second. When using Predis, the latency issue doesn't occur until the first get() call, and if I try connecting manually the latency occurs on the initial connection via fsockopen().

I've read the redis latency documentation, but none of the information seemed relevant to my case. Running redis-cli --latency just seemed to product a garbled mess. I guess my question is what's the best way to troubleshoot this? Any help would be much appreciated.

Predis Client instantiation:

$redis = new Predis\Client(array(
    'host'     => 'localhost',
    'port'     => 6379
));

Here's some relevant info:

• PHP 5.4.7
• XAMPP
• Windows 7 64-bit
• 16GB ram
• The redis server is running locally on port 6379

回答1:

On windows always use 127.0.0.1 instead of localhost.

In recent versions of windows resolution of name localhost is handled within DNS itself (it is a "feature" to help incorporate IPv6) and this dns query always take 1 sec.

来源：https://stackoverflow.com/questions/14076403/redis-connection-slow-from-php