# Write Slow Troubleshooting Ideas (A)

+ Typical issues
  + Slow writes due to physical environment
  + Business changes
  + Slow query statements
  + Write hot issues
+ Complex issues
  + Troubleshoot the TiDB write process
  + Determine the direction of investigation by phenomenon:
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From the above process instructions, we can see that TiDB is a complex system when there is a problem of slow write performance. There may be some issues that are more common, and others that may not be common. Therefore, when sorting out slow troubleshooting documents, the problems are divided into two categories, one type of problem is typical, including:
- Slow writes caused by the physical environment, such as network jitter, resource scramble, resource bottlenecks, etc.
- If the cluster is slow to write due to a business change, or after DDL is executed, it may be the impact of the business change
- Recent slow query statements
- Write hot issues
The other type of problem is atypical, which is a complex problem. It requires users to troubleshoot the cluster against the TiDB write process, locate the cause of the write performance problem, and find a method.