Search Ctrl K
Home / Tools
THE FEUTEX TOOLKIT

WAL Retention Disk Budget

Estimate whole WAL segments needed for a retention window and allowance.

Computer Systems workspace● Runs in your browser
01 Your input
02 Your result
View or copy raw result data
Formulasegments=ceil(rate×window/segmentSize)+allowance
Sources and model references

Worked example

Inputs

Measured WAL generation
1000000 bytes/s
Retention window
3600 s
WAL segment size
16777216 bytes
Extra allowance segments
2

Expected results

Whole segments retained
217 segments
Allocated WAL bytes
3640655872 bytes

Load the example in the workspace to reproduce these results. Display rounding does not change the underlying calculation.

How to use this tool

  1. Enter the labeled inputs in the indicated units.
  2. Calculate and compare every output against the stated model assumptions.

Try this example

{
  "rate": 1000000,
  "duration": 3600,
  "segment": 16777216,
  "extra": 2
}

Accuracy and scope

Steady observed rate; slots, archiving failures and workload spikes can retain substantially more. Simplified analytical model; not a design recommendation or safety certification.

Is my data uploaded?

This tool runs locally in your browser. Input and output are not sent to a processing server. Copy or download your result before leaving the page.