Description

Other files from the same pool may affect PGDATA size statistics, that why we should determine it by PGDATA subdir.

Related issue

Examples

Checklist

the MR description has been reviewed
this MR contains text changes and they have been reviewed OR there are no texts changes
this MR contains GUI/CLI changes and they have been reviewed OR there are no GUI/CLI changes
this MR contains API changes and they have been reviewed OR there are no API changes