mirror of
https://github.com/monitoring-mixins/website.git
synced 2024-12-14 11:37:31 +00:00
67 lines
2.8 KiB
YAML
67 lines
2.8 KiB
YAML
groups:
|
|
- name: varnish-cache
|
|
rules:
|
|
- alert: VarnishCacheLowCacheHitRate
|
|
annotations:
|
|
description: The Cache hit rate is {{ printf "%.0f" $value }} percent over the
|
|
last 5 minutes on {{$labels.instance}}, which is below the threshold of 80
|
|
percent.
|
|
summary: Cache is not answering a sufficient percentage of read requests.
|
|
expr: |
|
|
increase(varnish_main_cache_hit[10m]) / (clamp_min((increase(varnish_main_cache_hit[10m]) + increase(varnish_main_cache_miss[10m])), 1)) * 100 < 80 and (increase(varnish_main_cache_hit[10m]) + increase(varnish_main_cache_miss[10m]) > 0)
|
|
for: 10m
|
|
labels:
|
|
severity: warning
|
|
- alert: VarnishCacheHighMemoryUsage
|
|
annotations:
|
|
description: Current Memory Usage is {{ printf "%.0f" $value }} percent on {{$labels.instance}},
|
|
which is above the threshold of 90 percent.
|
|
summary: Varnish Cache is running low on available memory.
|
|
expr: |
|
|
(varnish_sma_g_bytes{type="s0"} / (varnish_sma_g_bytes{type="s0"} + varnish_sma_g_space{type="s0"})) * 100 > 90
|
|
for: 5m
|
|
labels:
|
|
severity: warning
|
|
- alert: VarnishCacheHighCacheEvictionRate
|
|
annotations:
|
|
description: The Cache has evicted {{ printf "%.0f" $value }} objects over the
|
|
last 5 minutes on {{$labels.instance}}, which is above the threshold of 0.
|
|
summary: The cache is evicting too many objects.
|
|
expr: |
|
|
increase(varnish_main_n_lru_nuked[5m]) > 0
|
|
for: 5m
|
|
labels:
|
|
severity: critical
|
|
- alert: VarnishCacheHighSaturation
|
|
annotations:
|
|
description: The thread queue length is {{ printf "%.0f" $value }} over the
|
|
last 5 minutes on {{$labels.instance}}, which is above the threshold of 0.
|
|
summary: There are too many threads in queue, Varnish is saturated and responses
|
|
are slowed.
|
|
expr: |
|
|
varnish_main_thread_queue_len > 0
|
|
for: 5m
|
|
labels:
|
|
severity: warning
|
|
- alert: VarnishCacheSessionsDropping
|
|
annotations:
|
|
description: The amount of sessions dropped is {{ printf "%.0f" $value }} over
|
|
the last 5 minutes on {{$labels.instance}}, which is above the threshold of
|
|
0.
|
|
summary: Incoming requests are being dropped due to a lack of free worker threads.
|
|
expr: |
|
|
increase(varnish_main_sessions{type="dropped"}[5m]) > 0
|
|
for: 5m
|
|
labels:
|
|
severity: critical
|
|
- alert: VarnishCacheBackendUnhealthy
|
|
annotations:
|
|
description: The amount of unhealthy backend statuses detected is {{ printf
|
|
"%.0f" $value }} over the last 5 minutes on {{$labels.instance}}, which is
|
|
above the threshold of 0.
|
|
summary: Backend has been marked as unhealthy due to slow 200 responses.
|
|
expr: |
|
|
increase(varnish_main_backend_unhealthy[5m]) > 0
|
|
for: 5m
|
|
labels:
|
|
severity: critical
|