For example, if a database server has 10 application servers and each is configured for 100 database connections, that would provide for 1,000 database connections. This approach causes the total number of connections on a database server to grow in relation to the number of application servers. Each application server can use a connection pool with the database. Handling connection scalingĪ common approach for scaling web applications to meet fluctuating demand is to add and remove application servers.

If your application’s development framework doesn’t support connection pooling, instead use a connection proxy, such as ProxySQL or Heimdall proxy, between the application and database server. These types of connections might occur, for example, over a magnitude of hundreds or thousands per second, and the time it takes to establish and close them is significant compared to the total connection lifetime. Consider connection pooling if your application opens many connections in a relatively short time and the connections are short lived.

Learn how to set up ProxySQL.Ĭonnection pooling is a mechanism that manages the creation and allocation of database connections and protects a database against connection surges. Replica: If you're using replica, use ProxySQL to balance off load between the primary server and the readable secondary replica server. Make sure to set the timeout or close connection when the transaction is complete. Replace short connections with persistent connections requires only minor changes to the code, but it has a major effect in terms of improving performance in many typical application scenarios. Persistent or Long-Lived Connection: If your application has short transactions or queries typically with execution time < 5-10 ms, then replace short connections with persistent connections. You can also refer to how to accelerate MySQL Performance with the Heimdall proxy. It supports query caching and read/write split with replication lag detection. Heimdall Data Proxy: Alternatively, you can also use Heimdall Data Proxy, a vendor-neutral proprietary proxy solution. ProxySQL: Use ProxySQL, which provides built-in connection pooling and load balance your workload to multiple read replicas as required on demand with any changes in application code. Here are some options for good connection practices: When an application requests a database connection, it prioritizes the allocation of existing idle database connections rather than creating a new one. Connection efficiencyĮstablishing a new connection is always an expensive and time-consuming task. This high-performance path bypasses the host from the datapath, reducing latency, jitter, and CPU utilization, for use with the most demanding network workloads on supported VM types. Accelerated Networking enables single root I/O virtualization (SR-IOV) to a VM, greatly improving its networking performance. Use accelerated networking for the application server if you're using Azure virtual machine, Azure Kubernetes, or App Services. This colocation is best for applications that are latency sensitive, and it also provides the best throughput, as resources are closely paired. To improve the performance and reliability of an application in a cost optimized deployment, it's highly recommended that the web application service and the Azure Database for MySQL resource reside in the same region and availability zone. Another side possible effect of having the application and database in separate regions relates to outbound data transfer costs. When resources such as a web application and its associated database are running in different regions, there might be increased latency in the communication between those resources. A quick check before starting any performance benchmarking run is to determine the network latency between the client and database using a simple SELECT 1 query. Make sure you deploy an application and the database in the same region. As we add new capabilities to the platform, we'll continue refining our recommendations in this section. Learn how to get best performance while working with your Azure Database for MySQL server. For more information about migrating to Azure Database for MySQL - Flexible Server, see What's happening to Azure Database for MySQL Single Server? We strongly recommend for you to upgrade to Azure Database for MySQL - Flexible Server. Azure Database for MySQL - Single Server is on the retirement path.

Mysql performance tuning