helm: include warmup_delay parameter (#920)

Author: burningalchemist

helm/README.md

@@ -106,11 +106,12 @@ as an example.
 
 | Key | Type | Default | Description |
 |-----|------|---------|-------------|
-| config | object | `{"global":{"max_connections":3,"max_idle_connections":3,"min_interval":"0s","scrape_error_drop_interval":"0s","scrape_timeout":"10s","scrape_timeout_offset":"500ms"}}` | SQL Exporter configuration, can be a dictionary, or a template yaml string. |
+| config | object | `{"global":{"max_connections":3,"max_idle_connections":3,"min_interval":"0s","scrape_error_drop_interval":"0s","scrape_timeout":"10s","scrape_timeout_offset":"500ms","warmup_delay":"0s"}}` | SQL Exporter configuration, can be a dictionary, or a template yaml string. |
 | config.global.scrape_timeout | string | `"10s"` | Scrape timeout |
 | config.global.scrape_timeout_offset | string | `"500ms"` | Scrape timeout offset. Must be strictly positive. |
 | config.global.scrape_error_drop_interval | string | `"0s"` | Interval between dropping scrape_errors_total metric: by default the metric is persistent. |
 | config.global.min_interval | string | `"0s"` | Minimum interval between collector runs. |
+| config.global.warmup_delay | string | `"0s"` | Delay between collector scrapes during the startup cache warmup. Disabled by default. |
 | config.global.max_connections | int | `3` | Number of open connections. |
 | config.global.max_idle_connections | int | `3` | Number of idle connections. |
 | target | object | `nil` | Check documentation. Mutually exclusive with `jobs`  |

helm/values.yaml

@@ -171,6 +171,8 @@ config:
     scrape_error_drop_interval: 0s
     # -- Minimum interval between collector runs.
     min_interval: 0s
+    # -- Delay between collector scrapes during the startup cache warmup. Disabled by default.
+    warmup_delay: 0s
     # -- Number of open connections.
     max_connections: 3
     # -- Number of idle connections.