Bug 764368 (GLUSTER-2636) - "profile info" lists 'nan' in latency when heavy i/o is running
Summary: "profile info" lists 'nan' in latency when heavy i/o is running
Keywords:
Status: CLOSED CURRENTRELEASE
Alias: GLUSTER-2636
Product: GlusterFS
Classification: Community
Component: glusterd
Version: mainline
Hardware: x86_64
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Pranith Kumar K
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2011-03-31 08:45 UTC by M S Vishwanath Bhat
Modified: 2016-06-01 01:55 UTC (History)
4 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed:
Regression: ---
Mount Type: ---
Documentation: ---
CRM:
Verified Versions:
Embargoed:

Attachments (Terms of Use)
profile info results taken for every 4000 secs (339.09 KB, text/plain)
2011-03-31 05:47 UTC, M S Vishwanath Bhat 		no flags Details
View All

Description M S Vishwanath Bhat 2011-03-31 05:47:50 UTC 
Created attachment 467
Comment 1 M S Vishwanath Bhat 2011-03-31 08:45:27 UTC 
Running profile info lists nan when dbench is running with 150 clients. 
 I was running dbench with 15 clients for 10 hours and was also running fileop with 35 directory depth. I was taking profile info after every 4000 seconds. After first 4000 seconds i started getting nan in profile results. I have attached profile results file for reference. I have also archived the logs.
Comment 2 M S Vishwanath Bhat 2011-04-05 07:01:56 UTC 
This bug can be reproduced even without heavy i/o. 
I Created a replicate setup with two bricks. Created 100 files and read from it. Ran profile info and i consistently got nan in latency. I have archived the logs.
Comment 3 Vijay Bellur 2011-04-07 15:40:12 UTC 
PATCH: http://patches.gluster.com/patch/6735 in master (mgmt/glusterd: Fix gluster-profile performance issues)
Comment 4 Vijay Bellur 2011-04-07 15:40:16 UTC 
PATCH: http://patches.gluster.com/patch/6736 in master (debug/io-stats: Fix races and performance issues in profile)
Comment 5 Raghavendra Bhat 2011-04-13 07:22:52 UTC 
Its fixed now. profile info does not say nan now.
Note You need to log in before you can comment on or make changes to this bug.