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Real-time monitoring of ClickHouse metrics, events, and asynchronous metrics. Use for load average, connections, queue monitoring, and resource saturation.
Codex または Claude でインストール この Prompt をコピーして Codex、Claude、または他のアシスタントに貼り付けると、Skill ページを確認してインストールできます。
SOC 職業分類に基づく
Read-only ClickHouse security audit expert for live or exported systems. Use when assessing ClickHouse security posture, reviewing users, roles, grants, settings profiles, row policies, table functions, external sources, table engines, executable UDFs, audit logs, named collections, password hash hygiene, SQL SECURITY DEFINER, impersonation, TLS/network exposure, Keeper/interserver security, encryption at rest, backups, the HTTP interface surface, cluster security, or version-specific ClickHouse security behavior. Diagnoses from SQL/system tables, supplied configuration files, query logs, access metadata, and ClickHouse/Altinity documentation.
Diagnose and resolve ClickHouse grant and authentication errors, especially after upgrades. Use when queries fail with ACCESS_DENIED/NOT_ENOUGH_PRIVILEGES, AUTHENTICATION_FAILED/WRONG_PASSWORD/REQUIRED_PASSWORD, or ON CLUSTER privilege errors; when system.* or INFORMATION_SCHEMA access is denied; or when grant behavior changes after version upgrades.
Analyze ClickHouse cache systems including mark cache, uncompressed cache, and query cache. Use for cache hit ratio issues and cache tuning.
Establishes the ClickHouse connection mode, cluster macro, and default log timeframe for diagnostics. Use first, before any other altinity-expert-clickhouse skill, to verify connectivity and set shared analysis rules.
Analyze ClickHouse external dictionaries including configuration, memory usage, reload status, and performance. Use for dictionary issues and load failures.
Analyze whether ClickHouse indexes (PRIMARY KEY, ORDER BY, skipping indexes, projections) are being used effectively for actual query patterns. Use when investigating index effectiveness, ORDER BY key design, query-to-index alignment, or when queries scan more data than expected.
| name | altinity-expert-clickhouse-metrics |
| description | Real-time monitoring of ClickHouse metrics, events, and asynchronous metrics. Use for load average, connections, queue monitoring, and resource saturation. |
| license | Apache-2.0 |
Real-time monitoring of ClickHouse metrics, events, and asynchronous metrics.
Run all queries from checks.sql in this skill's directory and analyze the results.
system.metrics - Current gauge valuessystem.events - Cumulative counters since restartsystem.asynchronous_metrics - System-level metricssystem.metric_log - Historical metricssystem.asynchronous_metric_log - Historical async metrics-- Find metrics by pattern
select * from system.metrics where metric like '%pattern%'
select * from system.asynchronous_metrics where metric like '%pattern%'
select * from system.events where event like '%pattern%'
| Finding | Load Module | Reason |
|---|---|---|
| High memory metrics | altinity-expert-clickhouse-memory | Memory analysis |
| High replica delay | altinity-expert-clickhouse-replication | Replication issues |
| High parts count | altinity-expert-clickhouse-merges | Merge backlog |
| High load average | altinity-expert-clickhouse-reporting | Query analysis |
| High connections | altinity-expert-clickhouse-reporting | Connection analysis |
| Metric | Warning | Critical |
|---|---|---|
ReadonlyReplica | - | > 0 |
Query | > 75% max | > 90% max |
MemoryResident | > 80% RAM | > 90% RAM |
MaxPartCountForPartition | > parts_to_delay | > parts_to_throw |
ReplicasMaxAbsoluteDelay | > 5 min | > 1 hour |
LoadAverage1 | > CPU count | > 2x CPU count |
ClickHouse exposes metrics at :9363/metrics in Prometheus format when enabled.