> For the complete documentation index, see [llms.txt](https://docs.devolutions.net/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.devolutions.net/server/knowledge-base/troubleshooting-articles/devolutions-server-performance-issues.md).

# Devolutions Server performance issues

Explains how to generate the disk usage by top tables report in SQL Server Management Studio to help Devolutions Support diagnose performance issues.

[Devolutions support](mailto:service@devolutions.net) can help you with Devolutions Server performance issues. To do so, the ***Disk usage by Top Tables*** ***report*** from ***SQL Server Management Studio (SSMS)*** must be generated to assess the number of records in specific database tables.

1. Open ***SQL Server Management Studio (SSMS)***.
2. Right-click the database and select ***Reports*** – ***Standard Reports*** – ***Disk Usage by Top Tables***.
3. Send the report to <service@devolutions.net>.

Here is the ***SQL query*** to get the same result if the database is hosted on ***Azure***.

```
SELECT TOP 1000
        a3.name AS SchemaName,
        a2.name AS TableName,
        a1.rows as Row_Count,
        (a1.reserved )* 8.0 / 1024 AS reserved_mb,
        a1.data * 8.0 / 1024 AS data_mb,
        (CASE WHEN (a1.used ) > a1.data THEN (a1.used ) - a1.data ELSE 0 END) * 8.0 / 1024 AS index_size_mb,
        (CASE WHEN (a1.reserved ) > a1.used THEN (a1.reserved ) - a1.used ELSE 0 END) * 8.0 / 1024 AS unused_mb
    FROM    (   SELECT
                ps.object_id,
                SUM ( CASE WHEN (ps.index_id < 2) THEN row_count    ELSE 0 END ) AS [rows],
                SUM (ps.reserved_page_count) AS reserved,
                SUM (CASE   WHEN (ps.index_id < 2) THEN (ps.in_row_data_page_count + ps.lob_used_page_count + ps.row_overflow_used_page_count)
                            ELSE (ps.lob_used_page_count + ps.row_overflow_used_page_count) END
                    ) AS data,
                SUM (ps.used_page_count) AS used
                FROM sys.dm_db_partition_stats ps
                GROUP BY ps.object_id
            ) AS a1
    INNER JOIN sys.all_objects a2  ON ( a1.object_id = a2.object_id )
    INNER JOIN sys.schemas a3 ON (a2.schema_id = a3.schema_id)
    WHERE a2.type <> N'S' and a2.type <> N'IT'
    order by a1.reserved desc
```

{% hint style="info" %}
The [Database retention policies](/server/web-interface/administration/database-retention-policies.md) in the ***Administration*** section can help reduce the number of records in the report table by automatically archiving/deleting old logs.
{% endhint %}


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