php.37-extension-lock mechanism to resolve concurrent-mysql lock, PHP file lock

The locking mechanism is suitable for high concurrency scenarios: High concurrent orders, seconds kill ...

Apache Stress test

MySQL Lock explanation

Grammar

Locking: LOCK Table table name 1 read| WRITE, table name 2 read| WRITE ......... .....

Unlock: UNLOCK TABLES

READ: Reading Lock | Shared Lock: All clients can only read this table and cannot write this table

Write: Lock | Lock: All currently locked clients can manipulate the table, and other clients will only block

Note: only locked tables can be manipulated during the lock table, and if you want to manipulate other tables, you must lock all the tables you want to manipulate!!

PHP File Lock detailed

Create a new lock file A.lock, act as a key

Recommendation: The project should only use the file lock in PHP, try to avoid the lock table , because if the table is locked, other operations on the table is blocked

php.37-extension-lock mechanism to resolve concurrent-mysql lock, PHP file lock