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TechnologyGenerated accuracy model review: 2026-05-06

SQL Server Log File Growth Calculator accuracy and testing

This page documents how Calwarden builds trust for this calculator: source notes, regression-style default tests, limitations, assumptions, unit handling, rounding, and visible change history.

Formula source

  • Daily log GB = base GB/day * (1 + maintenance percent / 100) * (1 + bulk percent / 100). Retained GB = daily log GB * retention days / compression ratio.

Test cases

Default input regression check

Generated from the checked-in default inputs and calculate function.

Inputs

  • Base Log Generated: 120 GB/day
  • Maintenance Overhead: 25%
  • Bulk Load Overhead: 10%
  • Log Retention: 7 days
  • Log Backup Interval: 1 hr
  • Backup Compression Ratio: 2 :1

Expected outputs

  • Retained Log Storage: 577.5 GB
  • Daily Log Generation: 165 GB/day
  • Average Log Backup Size: 3.44 GB
  • Log Backups per Day: 24

Known limitations

  • This page documents the checked-in calculator logic and does not certify results for every real-world edge case.
  • Use the result as a planning estimate unless the calculator page states a stricter purpose.

Assumptions

  • Daily log generation is averaged.
  • Compression ratio applies to retained log backups.
  • Database names and operational details are not stored.

Unit handling

  • Base Log Generated accepts values in GB/day.
  • Maintenance Overhead accepts values in %.
  • Bulk Load Overhead accepts values in %.
  • Log Retention accepts values in days.
  • Log Backup Interval accepts values in hr.
  • Backup Compression Ratio accepts values in :1.
  • Retained Log Storage is displayed in GB.
  • Daily Log Generation is displayed in GB/day.
  • Average Log Backup Size is displayed in GB.

Rounding rules

  • Number displays use up to 2 decimal places in the calculator UI.
  • Input precision follows configured step values where provided.

Version history

1.0.0 - 2026-05-06

Generated accuracy and testing page from the current sql-server-log-file-growth-calculator calculator definition.

Change log

2026-05-06

Published default regression test documentation and metadata fallbacks for SQL Server Log File Growth Calculator.

Calculator transparency

Accuracy pages are generated from checked-in calculator definitions and can be upgraded with curated review metadata over time.

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