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Bug #37784

Empty pg_temps are added to incremental map even if there're no changes in new epoch

Added by Aleksei Zakharov about 1 year ago. Updated 12 months ago.

Status:
Resolved
Priority:
Normal
Assignee:
-
Category:
Monitor
Target version:
-
% Done:

0%

Source:
Tags:
Backport:
luminous,mimic
Regression:
No
Severity:
3 - minor
Reviewed:
ceph-qa-suite:
Pull request ID:
Crash signature:

Description

Due to commit ea723fbb88c69bd00fefd32a3ee94bf5ce53569c
pg_temp with clean acting set are added to inc map.
It happens even if up next up acting == next acting.
This results in huge amount of pg_temps and traffic (and cpu consumption) spikes
when epoch is incremented on a large cluster.

This behavior could be reproduced by reweighting osd
to it's actual weight.

This behavior was mentioned in ceph-users mailing list: https://www.spinics.net/lists/ceph-users/msg50138.html


Related issues

Copied to Ceph - Backport #37810: mimic: Empty pg_temps are added to incremental map even if there're no changes in new epoch Resolved
Copied to Ceph - Backport #37811: luminous: Empty pg_temps are added to incremental map even if there're no changes in new epoch Resolved

History

#1 Updated by xie xingguo about 1 year ago

  • Backport changed from luminous to luminous,mimic

#2 Updated by xie xingguo about 1 year ago

  • Pull request ID set to 25780

#3 Updated by xie xingguo about 1 year ago

  • Status changed from New to Pending Backport

#4 Updated by Nathan Cutler about 1 year ago

  • Copied to Backport #37810: mimic: Empty pg_temps are added to incremental map even if there're no changes in new epoch added

#5 Updated by Nathan Cutler about 1 year ago

  • Copied to Backport #37811: luminous: Empty pg_temps are added to incremental map even if there're no changes in new epoch added

#6 Updated by Nathan Cutler 12 months ago

  • Status changed from Pending Backport to Resolved

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