SystemInfo SourceCode GPL - https://github.com/iboxdb/db4o-gpl

All Known Implementing Classes:

SystemInfoFileImpl
```
public interface SystemInfo
```
provides information about system state and system settings.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`int`	`freespaceEntryCount()`	returns the number of entries in the Freespace Manager.
`long`	`freespaceSize()`	returns the freespace size in the database in bytes.
`long`	`totalSize()`	Returns the total size of the database on disk.

- Method Detail
  - freespaceEntryCount
```
int freespaceEntryCount()
```
    returns the number of entries in the Freespace Manager.
    
    A high value for the number of freespace entries is an indication that the database is fragmented and that defragment should be run.
    
    Returns:
    
    the number of entries in the Freespace Manager.
  - freespaceSize
```
long freespaceSize()
```
    returns the freespace size in the database in bytes.
    
    When db4o stores modified objects, it allocates a new slot for it. During commit the old slot is freed. Free slots are collected in the freespace manager, so they can be reused for other objects.
    
    This method returns a sum of the size of all free slots in the database file.
    
    To reclaim freespace run defragment.
    
    Returns:
    
    the freespace size in the database in bytes.
  - totalSize
```
long totalSize()
```
    Returns the total size of the database on disk.
    
    Returns:
    
    total size of database on disk