Amazon RDS Read Replica Not Syncing Data as Expected with Laravel
I'm having trouble with Quick question that's been bugging me - I've been struggling with this for a few days now and could really use some help... I'm experiencing issues with my Laravel application where the read replicas of my Amazon RDS database aren't syncing data as expected. I have a master RDS instance located in the `us-west-2` region and two read replicas in the same region. The application uses Eloquent for database interactions, but I'm noticing that some queries on the replicas return stale data, even though I have confirmed that the data was updated on the master instance. I’m using the following DB configuration in `config/database.php`: ```php 'mysql' => [ 'driver' => 'mysql', 'host' => env('DB_HOST', '127.0.0.1'), 'port' => env('DB_PORT', '3306'), 'database' => env('DB_DATABASE', 'forge'), 'username' => env('DB_USERNAME', 'forge'), 'password' => env('DB_PASSWORD', ''), 'unix_socket' => env('DB_SOCKET', ''), 'charset' => 'utf8mb4', 'collation' => 'utf8mb4_unicode_ci', 'prefix' => '', 'strict' => true, 'engine' => null, ], ``` In my `.env` file, I'm explicitly setting the `DB_HOST` to point to the read replica. Here’s the relevant part of my environment configuration: ```env DB_CONNECTION=mysql DB_HOST=your-read-replica-endpoint DB_PORT=3306 DB_DATABASE=your_database DB_USERNAME=your_username DB_PASSWORD=your_password ``` I have also included a read write timeout of 2 seconds in my database connection options, but it seems that some of my read queries, especially those queried immediately after a write operation, still return old data rather than the latest updates. I’ve tried adjusting the `max_allowed_packet` setting on the RDS instance to 16MB, thinking that large data sizes could be impacting the replication. Additionally, I confirmed that there are no network issues between my application and the RDS instances. I also checked the replication status using the RDS console and it indicates that everything is fine. Could someone provide insights on what might be causing this delayed data synchronization on the read replicas, or suggest any best practices for using read replicas in a Laravel application? Thanks! I'm on Debian using the latest version of Php. What's the correct way to implement this? Am I approaching this the right way? Cheers for any assistance!