WRITELOG is one of the common wait types found in the SQL Server. It is directly related to the speed and efficiency of writing transaction log stored in the file system. This ensures durability and data integrity. When WRITELOG waits are high, it usually indicates that SQL Server is spending too much time waiting for in-memory transaction log cache to be flushed to the transaction log file. This can slow down transactions and ripple across the entire workload. In this guide, we will explore what causes WRITELOG waits, how to identify the root bottlenecks, and practical ways to reduce their impact through configuration, hardware optimization, and workload tuning.
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Execution Plan is like a blueprint. SQL Server uses it to execute a DML query. As a DBA, understanding execution plans is like reading the X-ray of query performance. It exposes where SQL Server spent its time and resources, which indexes used or ignored, and area of performance bottlenecks.
In this article, you will go through how to analyze SQL Server execution plans, interpret key operators, and identify optimization opportunities.
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