hbase开启ttl后每个小时的20和50分钟都会有hbase健康报警，ttlhbase
yesteday after we turn the big table TTL on, it have a big storage usage down
openfalcon disk monitor show the disk io is high at the unhealthy time range
hbase region log show the time that unhealty with log warnings
CDH diagnostic page show hbase healthy not normal
check the hbase storage which data time range it has
aws monitor shows that disk read not normal after we turn ttl on
just raise the number threshold
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