HI

I found many slow updates from  mongodb log ,as following:

2019-05-16T18:12:56.514+0800 I COMMAND [conn1931352] command db.$cmd command: update { update: "table", ordered: true, writeConcern:

{ j: true }

, updates: [ { q:

{ _id: ObjectId('5cd6e558d12f840077d79eb9') }

, u: { _id: ObjectId('5cd6e558d12f840077d79eb9'), im: "ebca3a98c70b8de169f2231195ca4f24", h: "www.aaaa.cc", nm: "nm-string", ch: "string", u: "html_addr", s: 1, ut: 1558001574941 }, upsert: true } ] } numYields:0 reslen:119 locks:{ Global: { acquireCount:

{ r: 2, w: 2 }

}, Database: { acquireCount:

{ w: 2 }

}, Collection: { acquireCount:

{ w: 1 }

}, Metadata: { acquireCount:

{ w: 1 }

}, oplog: { acquireCount:

{ w: 1 }

} } protocol:op_query 1571ms

but  i saw the secton of  locks ,  cound't find anything valuable .

version of mongodb is  3.4.17 

how can i  found   this 1571ms      costed by which section of mongodb.