# 8. Checking for System Changes and Log Hints

The last step in this guide is considering any system changes and/or log hints.

1. Were there any operating system and/or application changes?

2. Check the Studio EVENTS page and `memsql.log` for any information about recent log events at a high level. Sort by `event_level` to see those that are critical.

   * For more verbose logs, obtain the tracelog from the master aggregator data directory (the default for this is `/var/lib/memsql/node-nodeHash/data/tracelogs`).
   * Find the `memsql.log file` and run `tail -f` or `cat` and `grep` for “error” and/or “warning”.

     ![Events page shows changes and log hints.](https://images.contentstack.io/v3/assets/bltac01ee6daa3a1e14/blt185441e832b222c8/6a2c4325464cc23779852f06/16083b5797f155-6UqA6R.png)

## Final Recommendations

If nothing unusual arose in the investigation across all of this guide, but your cluster is still having performance issues, consider the following recommendations:

1. Did you properly capture the workload of interest in following the steps of this guide? It is possible an expensive query, queuing, or a resource problem was missed because the data was not examined at the right time. Make sure that the workload of interest is running during the time of investigation.

2. Does your system have a recommended configuration? Check [the `sdb-report` output](https://docs.singlestore.com/db/v9.1/user-and-cluster-administration/troubleshooting.md) again and consider any configuration optimization suggestions in the check output.

3. Is the system’s hardware healthy overall? Check disk and network performance. It is possible that a hardware issue might be leading to performance bottlenecks.

4. Refer to the [Troubleshooting Reference](https://docs.singlestore.com/db/v9.1/reference/troubleshooting-reference.md) to see if any of the reference topics included there are applicable to your cluster.

***

Modified at: July 30, 2024

Source: [/db/v9.1/user-and-cluster-administration/troubleshooting/8-checking-for-system-changes-and-log-hints/](https://docs.singlestore.com/db/v9.1/user-and-cluster-administration/troubleshooting/8-checking-for-system-changes-and-log-hints/)

(An index of the documentation is available at /llms.txt)