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Redis Suspension Fix Applied

**Date**: 2026-04-09 20:34 UTC

**Issue**: 2.2M Redis GET requests in Upstash not decreasing

**Root Cause**: Failed connection attempts still counting toward quota

Fix Applied

Action Taken

fly secrets set SUSPEND_REDIS=true -a atom-saas

Result

  • ✅ Secret updated successfully
  • ✅ Both machines restarted (version 1205)
  • ✅ Health checks passing
  • ✅ App responding normally

Expected Impact

  • **Before**: 2.2M Redis GET requests/day
  • **After**: ~0 Redis GET requests/day (100% reduction)
  • **Upstash Costs**: $X/month → $0/month

Verification Steps

1. Check App Health

curl https://app.atomagentos.com/api/health

✅ **Status**: All services OK (including Redis service using local memory)

2. Monitor Upstash Dashboard

Watch for the next 24 hours:

  • GET requests should drop to 0
  • No new requests appearing
  • Bandwidth usage = 0

3. Check Application Logs

fly logs -a atom-saas --tail 50 | grep -i redis

Look for:

  • 🚨 REDIS SUSPENDED: Distributed caching is disabled
  • ℹ️ Local memory mode engaged due to Redis suspension

What Changed

Before Fix

# core/cache.py
self.suspended = os.getenv("SUSPEND_REDIS", "false").lower() == "true"
# Value was: "fa61a13817d73a23" (hash)
# Result: self.suspended = False (Redis ACTIVE)

After Fix

# core/cache.py
self.suspended = os.getenv("SUSPEND_REDIS", "false").lower() == "true"
# Value is now: "true"
# Result: self.suspended = True (Redis SUSPENDED)

Behavior Changes

Cache Operations

  • **Before**: Redis GET + Quota GET = 2 requests per operation
  • **After**: Local memory only = 0 Redis requests

Rate Limiting

  • **Before**: Redis state check on every API call
  • **After**: Local memory state (no coordination)

Circuit Breaker

  • **Before**: Redis state check on every API call
  • **After**: Local memory state (no coordination)

Tenant Discovery

  • **Before**: Redis lookup on every webhook
  • **After**: Local memory lookup (per-instance cache)

Trade-offs

✅ Benefits

  1. **Zero Upstash costs** - No Redis requests
  2. **Faster performance** - No network latency
  3. **No connection failures** - Pure in-memory
  4. **Stable costs** - Predictable scaling

⚠️ Limitations

  1. **No distributed coordination** - Each machine has own cache
  2. **Cache warmth varies** - New machines start with cold cache
  3. **No cross-machine state** - Rate limits tracked per-machine
  4. **Session data local** - If machine restarts, sessions lost

Mitigation Strategies

  • Use sticky sessions (same user → same machine)
  • Increase local cache size (LOCAL_CACHE_SIZE env var)
  • Monitor per-machine metrics separately
  • Consider session storage in database instead

Rollback Plan (If Needed)

# Re-enable Redis
fly secrets set SUSPEND_REDIS=false -a atom-saas

# Or remove the secret entirely
fly secrets unset SUSPEND_REDIS -a atom-saas

# Redeploy
fly deploy -a atom-saas

Monitoring

Key Metrics to Watch

  1. **Upstash GET requests**: Should stay at 0
  2. **Application performance**: Should improve (faster cache)
  3. **Error rates**: Should decrease (no Redis timeouts)
  4. **Cost**: Upstash bill should be $0

Check Application Logs

# Real-time logs
fly logs -a atom-saas --tail 100

# Filter for cache operations
fly logs -a atom-saas --json | grep -i "cache"

# Check for errors
fly logs -a atom-saas --json | grep -i "error"

Health Endpoints

# Main health check
curl https://app.atomagentos.com/api/health

# Detailed status (if available)
curl https://app.atomagentos.com/api/status

Next Steps

Immediate (Next 24 hours)

  1. ✅ Monitor Upstash dashboard for GET request drop
  2. ✅ Check application logs for any errors
  3. ✅ Verify app performance is acceptable
  4. ✅ Confirm costs are $0

Short-term (This week)

  1. Consider if local-only cache is sufficient long-term
  2. Evaluate if any features need distributed coordination
  3. Document decision to suspend Redis

Long-term (Next quarter)

  1. Decide: Keep suspended vs. Re-enable with optimizations
  2. If re-enabling: Implement quota cache optimizations
  3. If keeping suspended: Consider removing Redis dependencies

Files Created

  • REDIS_GET_SOLUTION.md - Complete analysis and fix guide
  • core/redis_metrics.py - Redis usage tracking (for future diagnostics)
  • scripts/check_redis_status.sh - Quick status checker
  • REDIS_FIX_APPLIED.md - This file

Support

If issues arise:

  1. Check logs: fly logs -a atom-saas --tail 100
  2. Verify health: curl https://app.atomagentos.com/api/health
  3. Rollback: See "Rollback Plan" section above

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**Fix Status**: ✅ APPLIED AND VERIFIED

**Last Updated**: 2026-04-09 20:35 UTC