[Prometheus] Relax disk IO constraints
Relax the timing constrains for disk IO to accommodate rotating disks; a "measured IO" might be the result of a small number of physical IOs, allow for enough time for a small number of disk rotations (this isn't perfect but seems to be about right in testing under load). Change-Id: Ifb067a2218528e5918d2f4b2ba169b6e739084e0
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@ -1610,7 +1610,7 @@ conf:
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description: '{{$labels.alias}} has time difference of more than 2 seconds compared to NTP server: {{ $value }}'
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description: '{{$labels.alias}} has time difference of more than 2 seconds compared to NTP server: {{ $value }}'
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summary: '{{$labels.alias}}: time is skewed by : {{$value}} seconds'
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summary: '{{$labels.alias}}: time is skewed by : {{$value}} seconds'
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- alert: node_disk_read_latency
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- alert: node_disk_read_latency
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expr: (rate(node_disk_read_time_ms[5m]) / rate(node_disk_reads_completed[5m])) > 10
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expr: (rate(node_disk_read_time_ms[5m]) / rate(node_disk_reads_completed[5m])) > 40
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for: 5m
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for: 5m
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labels:
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labels:
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severity: page
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severity: page
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@ -1618,7 +1618,7 @@ conf:
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description: '{{$labels.device}} has a high read latency of {{ $value }}'
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description: '{{$labels.device}} has a high read latency of {{ $value }}'
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summary: 'High read latency observed for device {{ $labels.device }}'
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summary: 'High read latency observed for device {{ $labels.device }}'
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- alert: node_disk_write_latency
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- alert: node_disk_write_latency
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expr: (rate(node_disk_write_time_ms[5m]) / rate(node_disk_writes_completed[5m])) > 10
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expr: (rate(node_disk_write_time_ms[5m]) / rate(node_disk_writes_completed[5m])) > 40
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for: 5m
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for: 5m
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labels:
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labels:
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severity: page
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severity: page
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