AW5 kernel statistics report

[William la Forge]

The kernel now generates a statistics report on a close--which I've already used to nail several bugs. I'll note that all of the reported values are available as methods on Kernel, so they can be used in unit tests.

See below for a sample.

Bill

Kernel Statistics

Database Pathname: 0.aw4db

File Extent: 20000

Actual File Length: 10205

Max Root Block Size: 10000

Root Block 0 Length: 191

Root Block 1 Length: 201

DiskBlockManager1 Size: 0

DiskBlockManager2 Size: 0

DiskBlockManager3 Size: 0

Contexts Size: 0

Aborts: 0

Retries: 0

Commits: 1

Database Pathname: 1.aw4db

File Extent: 20000

Actual File Length: 10201

Max Root Block Size: 10000

Root Block 0 Length: 193

Root Block 1 Length: 197

DiskBlockManager1 Size: 0

DiskBlockManager2 Size: 0

DiskBlockManager3 Size: 0

AddressMap Size: 0

Database Pathname: 2.aw4db

File Extent: 20000

Actual File Length: 10201

Max Root Block Size: 10000

Root Block 0 Length: 193

Root Block 1 Length: 197

DiskBlockManager1 Size: 0

DiskBlockManager2 Size: 0

DiskBlockManager3 Size: 0

AddressMap Size: 0