Guanghao Zhang created HBASE-21367: -------------------------------------- Summary: Add table/region/row's statistics output for WALPrettyPrinter Key: HBASE-21367 URL: https://issues.apache.org/jira/browse/HBASE-21367 Project: HBase Issue Type: Improvement Reporter: Guanghao Zhang
A real case in our production cluster. We found one RS's replication peer replicated very slowly. And it is much slower than other RSs. Then we use WALPrettyPrinter to output the WAL's edits. And found 90% edits is for same row. It was a bug of user's MR job. The job always update same row but replicate to a peer cluster very slowly as we need replicate all updates to peer cluster. A statistics output for table/region/row will help us to find these problems quickly. It looks like as follows. ||Table/Region/Row||edits number|| |t1|xxxxx| |region2|xxxxx| |row3|xxxxx| -- This message was sent by Atlassian JIRA (v7.6.3#76005)