[SERVER-4475] moveChunk incredible slow and stuck on step3 Created: 12/Dec/11  Updated: 29/May/12  Resolved: 14/Jan/12

Status: Closed
Project: Core Server
Component/s: Sharding
Affects Version/s: 2.0.1
Fix Version/s: None

Type: Question Priority: Major - P3
Reporter: Michael Schwarzberger Assignee: Unassigned
Resolution: Incomplete Votes: 0
Labels: None
Remaining Estimate: Not Specified
Time Spent: Not Specified
Original Estimate: Not Specified

Participants:

 Description   

The moveChunk is incredible slow and we are moving some chunks for over 24 hours already.

This is one of the entries from the changelog. All are similar with step3 taking extremely long. Other Read/Write activity on the DB is low.

{ "_id" : "data1.local-2011-12-12T21:25:29-574", "server" : "data1.local", "clientAddr" : "", "time" : ISODate("2011-12-12T21:25:29.793Z"), "what" : "moveChunk.to", "ns" : "subscribers.subscribers", "details" : { "min" :

{ "email" : "<censored>" }

, "max" :

{ "email" : "<censored>" }

, "step1" : 1, "step2" : 0, "step3" : 69103, "step4" : 0, "step5" : 182 } }

How can i obtain more information on why step3 takes so long?



 Comments   
Comment by Eliot Horowitz (Inactive) [ 13/Dec/11 ]

That is 69 seconds - which is a pretty reasonable time to move a chunk.

Can you send the entries and mongod logs for one taking more than 24 hours?

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