Detailed explanation of swoole memory table

Memory operation module

Lock        Buffer        Table         Atomic        mmap        channel        serialize

Introduce

swooletable It is an ultra-high performance based on shared memory and lock , Concurrent data structure

advantage  

• Strong performance , Single thread reads and writes per second 200 Ten thousand times
• Application code does not need to be locked ,Table Built in row lock spin lock , All operations are multithreaded / Multi process security . The user layer does not need to consider the problem of data synchronization at all ;
• Support multiple processes ,Table It can be used to share data among multiple processes
• Use row lock , Instead of global lock , Only when the 2 Processes are in the same cpu Time , Lock grabbing occurs only when the same data is read concurrently

table.php

<?php

// Create a memory table 
$table = new \Swoole\Table(1024);

// Add a column to the memory table 
$table->column('id', $table::TYPE_INT,4);
$table->column('name', $table::TYPE_STRING,64);
$table->column('age', $table::TYPE_INT,3);
$table->create();

$table->set('wyt',['id'=>1,'name'=>'wyt','age'=>18]);

print_r($table->get('wyt'));

result

Self increasing

$table->incr('wyt','age',2);

Self reduction

$table->decr('wyt','age',2);