ILYA created COUCHDB-3088: ----------------------------- Summary: restart of couch_replication_server causes a stampede Key: COUCHDB-3088 URL: https://issues.apache.org/jira/browse/COUCHDB-3088 Project: CouchDB Issue Type: Bug Reporter: ILYA
couch_replication_server scans all files in database_dir searching for files matching "_replicator.<number>.couch". For every _replication db it does gen_server:cast(Server, {resume_scan, DbName}). This creates a stampede effect and causes sharp load spikes on the replication cluster. The problem get worse if you migrate from older version of couchdb. In this case there is a logic which injects validation ddoc into every _replication db. Causing a spike in [couchdb, database_writes] metric. -- This message was sent by Atlassian JIRA (v6.3.4#6332)