How to improve data deletion performance of PHP applications using Memcache?

Memcache is a high-performance distributed memory object caching system that can be used to improve application performance and scalability. In PHP applications, Memcache can help reduce the load on the database server, increase the speed of data reading and writing, and improve the performance of data deletion. This article will introduce how to use Memcache to improve the data deletion performance of PHP applications and provide specific code examples.

1. What is Memcache?

Memcache is a high-performance memory object cache system used to store key-value pair data. It can cache frequently used data in applications into memory to quickly respond to read requests. Using Memcache can reduce the load on the database server and improve application performance and scalability.

2. Why use Memcache?

In PHP applications, the database server is often one of the performance bottlenecks. When users request to frequently read the same batch of data or write large amounts of data, the load on the database server will increase dramatically, causing system performance to degrade. At this time, Memcache can be used to cache part of the data, improve the speed of reading and writing data, and reduce the load on the database server.

3. How to use Memcache?

1. Installing and starting Memcache

In Linux systems, you can use the following command to install Memcache:

sudo apt-get install memcached

After the installation is complete, you can use the following command to start the Memcache server:

sudo service memcached start

2. Access Memcache

Use PHP's Memcached extension, The Memcache server can be accessed through code. The sample code is as follows:

// Create Memcache object
$memcache = new Memcached();

// Add Memcache server
$memcache- >addServer('127.0.0.1', 11211);

//Set key-value pair data
$memcache->set('key', 'value', 3600);

// Read key-value pair data
$value = $memcache->get('key');

// Delete key-value pair data
$memcache-> delete('key');
?>

The above code creates a Memcached object and adds a Memcache server. Use the set() method to set a key-value pair data and set its expiration time to 3600 seconds. Use the get() method to read the key-value pair data, and use the delete() method to delete the key-value pair data.

4. How to use Memcache to improve data deletion performance?

In PHP applications, using Memcache can improve data deletion performance. This is done by marking only the data for deletion in the database rather than deleting it immediately. At the same time, the primary key of the data is used as the key, and all fields of the data are used as values, and stored in Memcache. In this way, when you need to read this data, you can read it from Memcache first. If it does not exist, read it from the database. When you need to delete this data, you only need to delete it from the database and delete the cache in Memcache.

The following is a sample code for using Memcache to improve data deletion performance:

// Create Memcache object
$memcache = new Memcached();

// Add Memcache server
$memcache->addServer('127.0.0.1', 11211);

// Get the primary key of data
$id = $_GET['id '];

// Read data from Memcache first
$data = $memcache->get($id);

if (!$data) {

// 如果数据不存在，则从数据库中查询
$sql = "SELECT * FROM `table` WHERE `id` = '$id'";
$result = $mysqli->query($sql);
$data = $result->fetch_assoc();

// 将数据存储到Memcache中，设置过期时间为60秒
$memcache->set($id, $data, 60);

} else {

// 如果数据存在，则打印提示信息
echo "data from cache.";

}

// Delete data
$sql = "DELETE FROM table WHERE id = '$id'";
$mysqli->query($sql);

// Delete cache from Memcache
$memcache->delete($id);
?>

The above code first reads data from Memcache. If the data does not exist, it reads it from the database, stores the data in Memcache, and sets the expiration time to 60 seconds. When data needs to be deleted, delete it from the database first and then delete the cache from Memcache.

5. Summary

Using Memcache can improve the performance and scalability of PHP applications. In scenarios where a large amount of data is written and read, using Memcache can reduce the load on the database server, increase the speed of data reading and writing, and improve the performance of data deletion. This article introduces how to use Memcache to improve data deletion performance and provides specific code examples. I hope readers can get help from it.

The above is the detailed content of How to improve data deletion performance of PHP applications using Memcache?. For more information, please follow other related articles on the PHP Chinese website!