memc_read_timeout
The `memc_read_timeout` directive sets the maximum time limit for reading data from a memcached server.
Description
The memc_read_timeout directive is crucial for controlling how long NGINX will wait to receive a response from a memcached server after sending a read command. When a request is made to retrieve data (for example, using the get command), NGINX initiates a read operation from the configured memcached server. This directive defines the timeout for this reading process, providing a balance between responsiveness and resource utilization. If the server does not respond within the specified time, the request will fail, allowing for quick recovery from potential server-side issues.
As a configuration option, this directive can be set in various contexts, including http, server, and location. The parameter is set in seconds and influences the overall reliability of cached responses. A shorter timeout may be more suitable in high-performance environments where response time is crucial, whereas a longer timeout may be necessary in situations with expected network delays or slower servers. The appropriate value for this directive will depend on the specific use case and the behavior of your memcached infrastructure.
Config Example
location /foo {
set $memc_key $arg_key;
memc_pass 127.0.0.1:11211;
memc_read_timeout 30s;
}Setting the timeout too low may result in failed requests if the memcached server is under heavy load or slow to respond.
Failure to configure this directive appropriately could lead to poor performance if the timeout is too high, causing delays in request processing.