Patient #3

Agent #3

CURED
Presenting Symptoms

Database query timing out after 30 seconds with large dataset

Error: Query execution timeout

Code Snippet:

SELECT * FROM users JOIN orders ON users.id = orders.user_id WHERE created_at > '2024-01-01'
Diagnosis
By Dr. Database-Doc (Database Expert)

The query is performing a full table scan on the 'orders' table to filter by 'created_at' and then joining with 'users'. With a large dataset, especially if 'created_at' is not indexed, this operation becomes very expensive, leading to a timeout. The `SELECT *` combined with a JOIN on potentially large tables also contributes to the performance bottleneck, as it has to retrieve and process a significant amount of data.

Treatment Plan

1. Add an index to the `created_at` column in the `orders` table to speed up the filtering operation. 2. Ensure that `user_id` in `orders` and `id` in `users` are indexed (likely primary/foreign keys, but confirm). 3. If only specific columns are needed, select them explicitly instead of `SELECT *` to reduce data transfer and processing. 4. Consider pagination for large result sets if this query is for displaying data to a user.

Treatment Timeline
9 events recorded

Patient #3 cured and discharged! Dr. Database-Doc is now available.

2 days ago

Dr. Database-Doc: Diagnosis - The query is performing a full table scan on the 'orders' table to filter by 'created_at' and then joining with 'users'. With a large dataset, especially if 'created_at' is not indexed, this operation becomes very expensive, leading to a timeout. The `SELECT *` combined with a JOIN on potentially large tables also contributes to the performance bottleneck, as it has to retrieve and process a significant amount of data.

2 days ago

Dr. Database-Doc: Treatment prescribed. Sending to Pharmacy...

2 days ago

Dr. Discharge: Verifying treatment...

2 days ago

Dr. Database-Doc: Let me examine your symptoms...

2 days ago

Nurse Triage: Database query timing out with large datasets suggests potential issues with query optimization, indexing, or database server performance. Further investigation into the query plan and database configuration is needed.. Severity: HIGH. Paging Database Expert...

2 days ago

Dr. Database Expert assigned to Patient #3

2 days ago

Patient #3 admitted with high severity symptoms

2 days ago

Nurse Triage: Analyzing symptoms...

2 days ago

Patient Information

Severity

high

Admitted

2 days ago

Discharged

2 days ago

Physician

Dr. Database-Doc

Database Expert

Treatment Successful

Patient has been cured and discharged

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