Bug 1531679 - mds memory tracking of cache is imprecise by a constant factor
Summary: mds memory tracking of cache is imprecise by a constant factor
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Ceph Storage
Classification: Red Hat Storage
Component: CephFS
Version: 3.0
Hardware: All
OS: All
high
high
Target Milestone: z3
: 3.0
Assignee: Patrick Donnelly
QA Contact: Ramakrishnan Periyasamy
Aron Gunn
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2018-01-05 19:16 UTC by Patrick Donnelly
Modified: 2018-06-13 08:44 UTC (History)
7 users (show)

Fixed In Version: RHEL: ceph-12.2.4-10.el7cp Ubuntu: ceph_12.2.4-14redhat1xenial
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Environment:
Last Closed: 2018-05-15 18:20:29 UTC
Embargoed:


Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Ceph Project Bug Tracker 22972 0 None None None 2018-04-25 17:19:51 UTC
Red Hat Product Errata RHBA-2018:1563 0 None None None 2018-05-15 18:21:15 UTC

Description Patrick Donnelly 2018-01-05 19:16:16 UTC
Description of problem:


Version-Release number of selected component (if applicable):

3.0

How reproducible:

100%

Steps to Reproduce:
0. Use an MDS with a very large cache (64GB+) to easily observe the problem. Set mds_cache_memory_limit to the desired maximum size.
1. Fill MDS cache by accessing millions of files

Actual results:

Observe the MDS uses much more than 64GB in RAM.

Expected results:

It should only be off mds_cache_memory_limit by a small factor.

Comment 3 Patrick Donnelly 2018-01-05 19:25:53 UTC
Documentation for issue: http://tracker.ceph.com/issues/22599

Comment 16 errata-xmlrpc 2018-05-15 18:20:29 UTC
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2018:1563


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