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CAROL-INI-2095-01: Reduce sustained infrastructure CPU usage below 50% threshold

Initiative
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📖About

The infrastructure CPU health metric currently scores 4.7 out of 10, indicating that CPU usage has been breaching the 50% threshold more often than the 1% allowance target. This initiative investigates which processes drove CPU to or above 50% during recent high-CPU sample windows, identifies the recurring root cause, implements a remediation, and confirms the metric recovers on the next infra scoreboard snapshot.

⚖️Decisions

  • Follow-on to parent INI 999900328 (orion)
  • Scope inherited verbatim from parent INI 999900328 per CAROL-INI-361. (elrond.initiative_author)
  • Validator-refinement (CAROL-INI-509): Refined 'nice_to_have' criterion: added cross-reference to cookbook #160/#161 remediation linkage as suggested by validator feedback, because present-day cookbook index confirms those recipes exist and should be referenced. (elrond.initiative_author)
  • Validator-refinement (CAROL-INI-509): Criterion 'A brief post-fix note is added to the cookbook or runbook describing the root cause and the fix, so the pattern is not repeated.' refined: present-day cookbook #160/#161 are about bypass remediation linkage, not runbook notes; #305 (daily disk cleanup by Hagrid) is a better cross-reference for a generic runbook pattern. (elrond.initiative_author)
  • Validator round 2 still flagged 3 items — operator review needed (CAROL-INI-509). (elrond.initiative_validator)
  • [status-router] planned -> dispatched | event=dispatch | RSI: auto-promoted bypasses depth limit (CAROL-INI-2198) (spb-01)
  • [status-router] dispatched -> blocked | event=stuck_10min_no_activity | Elrond safety net: initiative has had no activity for 10+ minutes. Blocking under the parallel safety mechanism. (el-watchdog)
  • Elrond safety net blocked initiative: no activity for 10+ minutes. Parallel mechanism (twin of handshake). (el-watchdog)
  • Elrond blocked initiative under the CAROL-INI-2162 dead-Albus protocol. Albus was supposed to wake for step 0 (cause=albus_no_show) but did not respond. Cause: albus_no_show. Reason: Elrond safety net: initiative stranded 10+ min. Albus wake failed or produced no useful result. (el-s1)
  • Orion remediated: Albus RSI group diagnosis (via INI 999900502): [procedural, confidence high] The Albus executor did not wake to process step 0 of the initiative after dispatch (albus_no_show), leaving it idle with no execution history until the Elrond safety net blocked it after 10 minutes of inactivity. This is a procedural failure consistent with a systemic pattern where Albus fails to respond to dispatch events, as confirmed by the empty execution history and the dead-Albus protocol decision. (orion)
  • [status-router] blocked -> closed | event=operator_put | PUT /api/initiatives (operator)
  • [rsi-group-cure] Cured by the group diagnosis on INI 999900502 (shared cause stuck_10min_no_activity); retriggered as INI 999900841. Root cause: [procedural, confidence high] The Albus executor did not wake to process step 0 of the initiative after dispatch (albus_no_show), leaving it idle with no execution history until the Elrond safety net blocked it after 10 minutes of inactivity. This is a procedural failure consistent with a systemic pattern where Albus fails to respond to dispatch events, as confirmed by the empty execution history (elrond.rsi_loop)

Success criteria

  • The root-cause process or processes responsible for CPU breaching 50% during recent sample windows are named and documented. (must_have)
  • A code, configuration, or operational change addressing the identified root cause is live in the environment. (must_have)
  • The infra scoreboard CPU metric score on the next scheduled snapshot is higher than 4.7, reflecting fewer high-CPU sample windows. (must_have)
  • CPU usage remains below 50% in at least 99% of sample windows across the verification window following the fix. (must_have)
  • A brief post-fix note is added to the cookbook or runbook describing the root cause and the fix, cross-referencing cookbook #305 (daily disk cleanup) or the generic remediation documentation pattern. (nice_to_have)