When WordPress displays a 503 error, it usually indicates a server problem, which is commonly connected to heavy traffic or plugin conflicts. It can be difficult to pinpoint the precise cause when this issue occurs following actions such as clicking the "Update" button. Checking server load, cleaning the cache, and resource optimization are some methods to address this.

When contacting AWS Lambda from an API Gateway to access DynamoDB, it can be difficult to diagnose if you encounter a 503 error, particularly if logs show no errors. Throttling or timeout settings that are not adjusted for large volume requests are frequently the cause of this problem. You can enhance load management and data call dependability by putting retry logic, exponential backoff, caching techniques, and monitoring into practice. This will guarantee smoother performance even during periods of high demand.