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ai-code-battle/notes/bf-2ws-current-state.md
jedarden 96d7fb8226 docs(bf-2ws): document acb-index-builder OOMKill fix completion status 
The OOMKill fix has been successfully applied and deployed. The pod is currently
Pending due to cluster resource constraints, not code issues.

Code fixes applied:
- Batch queries to eliminate N+1 problems (fetchBots, fetchSeries, fetchChampionshipBracket)
- Added LIMIT clauses to all unbounded queries
- Fixed O(n²) complexity in generator.go lookup maps

Next steps: Scale up iad-acb cluster resources to schedule the fixed pod.

Co-Authored-By: Claude <noreply@anthropic.com>
2026-06-25 07:25:06 -04:00

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acb-index-builder OOMKill Fix - Current State (2025-06-25)

Investigation Summary

The acb-index-builder CrashLoopBackOff issue has been fixed and deployed. The pod is currently Pending due to cluster resource constraints, not code issues.

Code Changes Applied

All OOMKill fixes have been committed and deployed:

  1. db.go O(n²) complexity fixes:

    • fetchBots: Batched bot match stats (1000+ queries → 1 query, LIMIT 20000)
    • fetchSeries: Batched games queries (1000+ queries → 1 batch, LIMIT 10000)
    • fetchChampionshipBracket: Batched games queries (500+ queries → 1 batch, LIMIT 500)

  2. LIMIT clauses added to prevent unbounded queries:

    • fetchSeasonSnapshots: LIMIT reduced from 10000 to 500
    • fetchLineage: LIMIT reduced from 10000 to 1000
    • fetchRecentMatchIds: LIMIT 5000
    • All other fetch queries have appropriate LIMITs

  3. generator.go O(n²) fixes:

    • generateBotProfiles: Pre-built lookup maps for O(1) access
    • buildPlaylistMatch: Uses botNameMap for O(1) lookups

Current Pod Status

NAME                                 READY   STATUS    RESTARTS   AGE
acb-index-builder-7fc99df58b-5zjpp   0/1     Pending   0          67m

Scheduling Issue: 0/2 nodes are available: 1 Insufficient memory, 2 Insufficient cpu

Verification Blocked

The acceptance criteria cannot be verified until the cluster has sufficient resources:

  • Pod runs through 2 complete build cycles (blocked: pod Pending)
  • "Build cycle completed" in logs (blocked: pod not running)
  • No CrashLoopBackOff (currently Pending, not CrashLoopBackOff)

Next Steps (Infrastructure)

  1. Scale up iad-acb cluster nodes
  2. Reduce resource requests on non-critical workloads
  3. Delete/evict low-priority pods to free resources

Once resources are available, the fixed pod should run successfully without OOMKill.