profile and monitoring

Author: Cmdv

dev-tools/monitoring/README.md

@@ -119,136 +119,6 @@ Exposed on port **8080** via Prometheus endpoint in cardano-db-sync.
 - `dbsync_ledger_snapshot_duration_seconds` - Time to save ledger snapshot
 - `dbsync_ledger_events_processed_total` - Ledger events processed
 
-## Useful Queries
-
-### PostgreSQL Performance
-
-**Buffer cache hit ratio** (should be >99%):
-```promql
-rate(pg_stat_database_blks_hit[5m]) /
-(rate(pg_stat_database_blks_hit[5m]) + rate(pg_stat_database_blks_read[5m]))
-```
-
-**Transaction rate**:
-```promql
-rate(pg_stat_database_xact_commit[5m])
-```
-
-**Database growth rate** (bytes per second):
-```promql
-rate(pg_database_size_bytes[5m])
-```
-
-**Dead tuple percentage** (high values indicate need for VACUUM):
-```promql
-pg_stat_user_tables_n_dead_tup /
-(pg_stat_user_tables_n_live_tup + pg_stat_user_tables_n_dead_tup)
-```
-
-### System Performance
-
-**CPU usage percentage**:
-```promql
-100 - (avg by (instance) (rate(node_cpu_seconds_total{mode="idle"}[5m])) * 100)
-```
-
-**Memory usage percentage**:
-```promql
-100 - ((node_memory_MemAvailable_bytes / node_memory_MemTotal_bytes) * 100)
-```
-
-**Disk I/O rate** (MB/s):
-```promql
-(rate(node_disk_read_bytes_total[5m]) + rate(node_disk_written_bytes_total[5m])) / 1024 / 1024
-```
-
-**Filesystem usage percentage**:
-```promql
-100 - ((node_filesystem_avail_bytes / node_filesystem_size_bytes) * 100)
-```
-
-### Cardano DB Sync (once implemented)
-
-**Sync lag** (difference between chain tip and synced block):
-```promql
-chain_tip_block_height - dbsync_block_height
-```
-
-**Block processing rate** (blocks per second):
-```promql
-rate(dbsync_block_height[5m])
-```
-
-**Cache hit ratio**:
-```promql
-rate(dbsync_cache_hits_total[5m]) /
-(rate(dbsync_cache_hits_total[5m]) + rate(dbsync_cache_misses_total[5m]))
-```
-
-**Memory growth rate**:
-```promql
-rate(dbsync_memory_heap_size_bytes[5m])
-```
-
-**GC overhead**:
-```promql
-rate(dbsync_memory_gc_cpu_seconds[5m]) /
-(rate(dbsync_memory_gc_cpu_seconds[5m]) + rate(process_cpu_seconds_total[5m]))
-```
-
-## Alerting Rules (Examples)
-
-These can be added to Prometheus alerting rules:
-
-```yaml
-groups:
-  - name: cardano-db-sync
-    rules:
-      # High memory usage
-      - alert: HighMemoryUsage
-        expr: (node_memory_MemAvailable_bytes / node_memory_MemTotal_bytes) < 0.1
-        for: 5m
-        labels:
-          severity: warning
-        annotations:
-          summary: "High memory usage on {{ $labels.instance }}"
-          description: "Available memory is below 10%"
-
-      # Database size growing too fast
-      - alert: RapidDatabaseGrowth
-        expr: rate(pg_database_size_bytes[1h]) > 1073741824  # 1GB/hour
-        for: 1h
-        labels:
-          severity: warning
-        annotations:
-          summary: "Database growing rapidly"
-          description: "Database growing at {{ $value | humanize }} bytes/sec"
-
-      # Too many dead tuples
-      - alert: HighDeadTuples
-        expr: |
-          (pg_stat_user_tables_n_dead_tup /
-          (pg_stat_user_tables_n_live_tup + pg_stat_user_tables_n_dead_tup)) > 0.2
-        for: 30m
-        labels:
-          severity: warning
-        annotations:
-          summary: "High dead tuple ratio on table {{ $labels.relname }}"
-          description: "Dead tuples exceed 20%, consider VACUUM"
-
-      # Low buffer cache hit ratio
-      - alert: LowBufferCacheHitRatio
-        expr: |
-          (rate(pg_stat_database_blks_hit[5m]) /
-          (rate(pg_stat_database_blks_hit[5m]) + rate(pg_stat_database_blks_read[5m]))) < 0.95
-        for: 10m
-        labels:
-          severity: warning
-        annotations:
-          summary: "Low PostgreSQL buffer cache hit ratio"
-          description: "Cache hit ratio is {{ $value | humanizePercentage }}"
-```
-
 ## See Also
 
 - [Prometheus Query Documentation](https://prometheus.io/docs/prometheus/latest/querying/basics/)