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template: bcache_cache_errors
on: disk.bcache_cache_read_races
class: Errors
type: System
component: Disk
lookup: sum -1m unaligned absolute
units: errors
every: 1m
warn: $this > 0
delay: up 2m down 1h multiplier 1.5 max 2h
info: number of times data was read from the cache, \
the bucket was reused and invalidated in the last 10 minutes \
(when this occurs the data is reread from the backing device)
to: sysadmin
template: bcache_cache_dirty
on: disk.bcache_cache_alloc
class: Utilization
type: System
component: Disk
calc: $dirty + $metadata + $undefined
units: %
every: 1m
warn: $this > 75
delay: up 1m down 1h multiplier 1.5 max 2h
info: percentage of cache space used for dirty data and metadata \
(this usually means your SSD cache is too small)
to: sysadmin
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