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UV 14.2.1 uvconfig N_AFT, N_AFT_SECTION and N_AFT_SECTION_BUCKET

  • October 16, 2026
  • 1 reply
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Gregor Scott
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The default uvconfig values for these settings are:

N_AFT 5000
N_AFT_SECTION 17
N_AFT_SECTION_BUCKET 23

 

These result in 294.12 files per SECTION, and 12.79 files per SECTION BUCKET.

 

The N_AFT setting is too small for our needs so we will be increasing it. What I am interested to explore is what are the deciding factors needing consideration when adjusting N_AFT_SECTION and N_AFT_SECTION_BUCKET ?

 

Should the current ratios be maintained as best as possible? For example, if N_AFT is set to 15000 a custom setting of 53 for N_AFT_SECTION would result in 283.02 files per SECTION and 12.31 files per SECTION BUCKET, which are close to the default ratios.

Is this the best approach, or should I take a different track?

 

1 reply

Gregor Scott
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  • October 16, 2026

Those example numbers are (of course) invalid, as the N_AFT_SECTION_BUCKET value must be a prime number larger than N_AFT_SECTION.

A more valid example for N_AFT of 15000 is N_ACT_SECTION set to 31 and N_AFT_SECTION_BUCKET set to 37. This produces a higher ration of 483.87 files per SECTION but a similar 13.08 files per SECTION BUCKET.