GreptimeDB MCP Server

# PromQL Analysis: {{ metric }} **Time Range**: {{ start_time }} to {{ end_time }} ## TQL EVAL Syntax Use `execute_tql` tool with PromQL expressions. Time parameters are passed separately. ## Common Queries ### Rate & Increase ```promql -- Request rate (per second) rate({{ metric }}[5m]) -- Total increase over window increase({{ metric }}[1h]) -- Rate with label filter rate({{ metric }}{job="api", status="500"}[5m]) ``` ### Aggregations ```promql -- Sum across all instances sum(rate({{ metric }}[5m])) -- Sum by label sum by (instance) (rate({{ metric }}[5m])) -- Average by service avg by (service) ({{ metric }}) ``` ### Histogram Percentiles ```promql -- 99th percentile latency histogram_quantile(0.99, rate({{ metric }}_bucket[5m])) -- Multiple percentiles histogram_quantile(0.95, sum by (le) (rate({{ metric }}_bucket[5m]))) ``` ### Comparison & Alerts ```promql -- Error rate > 1% sum(rate(errors_total[5m])) / sum(rate(requests_total[5m])) > 0.01 -- High latency detection histogram_quantile(0.99, rate({{ metric }}_bucket[5m])) > 0.5 ``` ## Notes - Use `execute_tql` tool with: query, start, end, step (required), lookback (optional) - Label matchers: `=`, `!=`, `=~` (regex), `!~` - Time durations: s, m, h, d, w ## References - [TQL (PromQL) Reference](https://docs.greptime.com/reference/sql/tql) - TQL EVAL syntax and supported functions - [PromQL Query Guide](https://docs.greptime.com/user-guide/query-data/promql) - PromQL query patterns and examples - [Time Durations](https://docs.greptime.com/reference/time-durations) - Time duration format reference