Operation and maintenance - PHP encounters occasional session loss when using memcached to save sessions?

It is an occasional loss. For example, the $_SESSION I read during the second ajax request was an empty array. The $_SESSION value was normal again during the third request. However, I once initiated five ajax requests at the same time on a certain page. When there are six requests, there is a high probability that a certain session will be lost. Please help, how to solve it

php.ini is as follows

<code>session.save_handler = memcached
session.save_path = "127.0.0.1:11211"</code>

The running environment is in my vagrant virtual machine. PHP and memcahe are installed in this virtual machine. PHP is 5.6 and memcache is 1.4.4. The strange thing is that when I save the session as a file, I don’t encounter the problem of session loss

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It is an occasional loss. For example, the $_SESSION I read during the second ajax request was an empty array. The $_SESSION value was normal again during the third request. However, I once initiated five ajax requests at the same time on a certain page. When there are six requests, there is a high probability that a certain session will be lost. Please help, how to solve it

php.ini is as follows

<code>session.save_handler = memcached
session.save_path = "127.0.0.1:11211"</code>

The running environment is in my vagrant virtual machine. PHP and memcahe are installed in this virtual machine. PHP is 5.6 and memcache is 1.4.4. The strange thing is that when I save the session as a file, I don’t encounter the problem of session loss

The hit rate of memcache cannot be so low. Is the memcache full? Or are multiple machines used in the background, and the memcache used for session storage is not shared?
The specific problem depends on the code

Session has a concurrency consistency problem. You can lock when writing data and release the lock after writing
Please see the explanation here: http://justcoding.iteye.com/b...