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template: bcache_cache_errors
on: disk.bcache_cache_read_races
lookup: sum -1m unaligned absolute
units: errors
every: 1m
warn: $this > 0
delay: up 2m down 1h multiplier 1.5 max 2h
info: the number of times the data was being read from the cache, the bucket was reused and invalidated, during the last 10 mins (when this occurs the data is reread from the backing device)
to: sysadmin
template: bcache_cache_dirty
on: disk.bcache_cache_alloc
calc: $dirty + $metadata + $undefined
units: %
every: 1m
warn: $this > ( ($status >= $WARNING ) ? ( 70 ) : ( 90 ) )
crit: $this > ( ($status == $CRITICAL) ? ( 90 ) : ( 95 ) )
delay: up 1m down 1h multiplier 1.5 max 2h
info: the percentage of cache space used for dirty and metadata (this usually means your SSD cache is too small)
to: sysadmin
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