How do I clear the buffer cache in AWS RDS oracle?

Question

```
ALTER SYSTEM FLUSH BUFFER_CACHE;
```
I tried to delete the buffer cache using , but I don't have permission.

I ran the following command in AWS DOCS.

```
EXEC rdsadmin.rdsadmin_util.flush_buffer_cache;
```

But I got the error "SQL Error [900] [42000]: ORA-00900".

What should I do?

Answer

To clear the buffer cache in AWS RDS Oracle, you can try running the following command as the RDS superuser:

```
EXEC rdsadmin.rdsadmin_util.flush_buffer_cache;
```

Note that this command requires superuser privileges, so you may need to grant yourself the necessary permissions before running it. Additionally, you may need to run the command in a specific schema, such as rdsadmin, to avoid the ORA-00900 error.

If you are unable to run the command or are still encountering errors, you can try using the ALTER SYSTEM command instead:

```
ALTER SYSTEM FLUSH BUFFER_CACHE;
```

This command may require the ALTER SYSTEM privilege, which you can grant to yourself using the GRANT statement. For example:

```
GRANT ALTER SYSTEM TO myuser;
```

Keep in mind that clearing the buffer cache can have a negative impact on database performance, so it should only be done as a last resort and under the guidance of a qualified DBA.

How do I clear the buffer cache in AWS RDS oracle?

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