Bug #23608

ENC with smart class parameters is slow (regression with 1.16)

Added by Bastian Blank about 4 years ago. Updated about 4 years ago.

Target version:
Bugzilla link:


If a host uses a lot of smart class parameters (50+), running the ENC gets awful slow. Runtimes of 10 or more seconds have been reported. The runtime grows linear with the number of parameters.

Classification::ValuesHashQuery#values_hash is used to retrieve all the parameters used in the ENC. For each key this method calls lookup_values_cache with the same parameters. The called method assembles a database query, which is pretty slow, even if it never shows up in the ActiveRecord time and just runs against the cache.

The simple fix just calculates the result of lookup_values_cache once.

However I'm not sure if this code is even correct now, as different parameters can have different orders.

Associated revisions

Revision a538c9b5 (diff)
Added by Bastian Blank about 4 years ago

Fixes #23608 - Only calculate lookup values once


#1 Updated by The Foreman Bot about 4 years ago

  • Pull request added

#2 Updated by The Foreman Bot about 4 years ago

  • Status changed from New to Ready For Testing

#3 Updated by Anonymous about 4 years ago

  • % Done changed from 0 to 100
  • Status changed from Ready For Testing to Closed

#4 Updated by The Foreman Bot about 4 years ago

  • Assignee set to Anonymous
  • Pull request added

#5 Updated by Marek Hulán about 4 years ago

  • Legacy Backlogs Release (now unused) set to 359

#6 Updated by Ewoud Kohl van Wijngaarden about 4 years ago

  • Triaged set to No
  • Found in Releases 1.16.1 added
  • Fixed in Releases 1.16.2, 1.17.2 added

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