I'm trying to create a new database on postgres, by running command:

```
CREATE DATABASE dbname;

```

and I face the error:

> 
> WARNING: could not flush dirty data: Function not implemented
> 
> 
> 

many times! and finally I get the message 

> 
> CREATE DATABASE
> 
> 
> 

Can anyone help me to undrestand and solve this error please?