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.