Home › Discussions › Questions & Answers › Database CPU Spikes: Finding the Culprit SQL
Customer · · Questions & Answers · 5 replies
We are experiencing significant CPU spikes on our database server every morning, causing slowdowns across EBS. How can I quickly pinpoint the specific SQL statements responsible for this high load?
You should run the DBA AWR SQL Performance Summary report. This report retrieves summarized execution statistics, focusing on CPU-intensive SQLs, as the default sorting prioritizes maximizing server load optimization.
Which columns in the report should I focus on to confirm CPU consumption, and how can I narrow down the time frame to match our morning spike?
Look primarily at the ‘Cpu Time’ and ‘Buffer IO’ columns; high CPU time often indicates massive amounts of data read from the buffer cache. To target the time window, ensure you filter the report using the snapshot interval parameters corresponding to your morning peak hours.
If the problem SQL is highly CPU intensive, is that a sure sign of inefficient query logic?
High CPU time suggests the SQL is reading a lot of data, often due to poor indexing or full table scans. You can drill down using the SQL_ID and Plan Hash Value to analyze the execution path using DBA SGA SQL Execution Plan History.
Sign in with LinkedIn or Google to take part.
