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name: the duration of memtables (histogram, seconds), only update when memtable will be flushed

tags: sg=<name>

Flush: Files

name: time cost of flushing a memtable

tags: sg=<name>

name: time cost of ordering data

tags: sg=<name>

name: time cost of encoding

tags: sg=<name>

name: time cost of IO

tags: sg=<name>

name: size of encoded memtable

tags: sg=<name>

name: number of pending tasks

tags: sg=<name>

name: number of flushing tasks

tags: sg=<name>

Compaction

• TTL
• Unseq
• ...

Lingzhe Zhang

as detailed as possible for diagnosing.

name: number of pending files

tags: sg=<name>

Cluster

Xinyu Tan

as detailed as possible for diagnosing.

QueryExecutor

Xiangwei Wei

Cache

Size and Hit Ratio  Yuan Tian

MManager

Zesong Sun

Last 

UDF

MQTT

Sync