Application ComosDB Dependency experiencing significant slowdown

Question

Application ComosDB Dependency experiencing significant slowdown

Ricardo Santos 0

Starting on November 27th, I observed a significant slowdown in my application's performance.

Upon reviewing my Insights Monitor, I identified a specific dependency that exhibited a significant increase in latency on this day.

Captura de Tela 2023-12-05 às 09.34.25

The image above illustrates a shift in Cosmos DB's endpoint usage.

Initially, Cosmos DB employed a Query document endpoint directed to domain.brazilsouth.documents.azure.com. However, at a certain point, this endpoint was replaced by a GET request to domain.documents.azure.com. This transition resulted in a significant increase in response time, with each GET request consuming 3.5 seconds compared to the previous 4 milliseconds observed with Query document endpoint.

No changes were made to the application during that period. So, I can't understand why this happened.

Restarting the applications connected to the database did not resolve the performance issue.

I am seeking any information that could shed light on this behavior and help me identify the root cause.

GeethaThatipatri-MSFT 29,597 Reputation points Microsoft Employee Moderator

2023-12-05T16:58:27.3066667+00:00

Hi @Ricardo Santos

I'm sorry to hear that you're experiencing performance issues with your Cosmos DB instance. Based on the information you provided, it seems that there was a change in the endpoint usage of your Cosmos DB instance that resulted in a significant increase in response time. However, the best way is to create a support for further investigation.

Let me know if you need any help in raising a support case.

Regards

Geetha