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Bug #25966

Update module that reports ARC Hit Ratio

Added by Richard Kojedzinszky about 1 year ago. Updated 10 months ago.

Status:
Resolved
Priority:
Important
Assignee:
John Hixson
Category:
Middleware
Target version:
11.1
Seen in:
11.0-U3
Severity:
Reason for Closing:
Reason for Blocked:
Needs QA:
Yes
Needs Doc:
Yes
Needs Merging:
Yes
Needs Automation:
No
Support Suite Ticket:
n/a
Hardware Configuration:
ChangeLog Required:
No

Description

Upstream collectd has just merged the fix to collect usable arc hit statistics, it would be nice to be included in FreeNAS as well.

Related issues

Related to FreeNAS - Bug #28489: Discontinuous or bouncing graph in ARC Hit Ratio ReportingClosed

History

#2 Updated by Dru Lavigne about 1 year ago

  • Assignee changed from Release Council to William Grzybowski

William: please load balance.

#3 Updated by William Grzybowski about 1 year ago

  • Category changed from GUI (new) to Middleware
  • Status changed from Unscreened to Screened
  • Priority changed from No priority to Important
  • Target version set to 11.2-BETA1

Thanks, but we are going to have to wait a new collectd release to bring this in.

#4 Updated by Richard Kojedzinszky about 1 year ago

In my perspective, FreeNAS is A product, which provides graphs. Many users dont know which software provides, and even dont care.
From this point I would fix the graphs. Even with that the current graphs are pretty useless.

https://github.com/freenas/ports/pull/27

Regards,

#5 Updated by William Grzybowski about 1 year ago

They dont, but we developers rely on these softwares.

We are not experts on each and every software used in the product and bringing arbitrary patches skipping the release process of a given third-party software may affect us in a bad way. In general, its better to be safe than sorry.

#6 Updated by William Grzybowski about 1 year ago

  • Status changed from Screened to Unscreened
  • Assignee changed from William Grzybowski to John Hixson

From the PR, it looks like John will have a look at it.

#7 Updated by John Hixson about 1 year ago

  • Status changed from Unscreened to Reviewed by Developer
  • Assignee changed from John Hixson to Release Council

Looks good to me. Please commit to freenas/master branch of ports repo as well.

#8 Updated by Dru Lavigne about 1 year ago

  • Assignee changed from Release Council to William Grzybowski

#9 Updated by William Grzybowski about 1 year ago

  • Assignee changed from William Grzybowski to John Hixson

I didnt review the code, in fact I was not in favor of doing this now, I am not the one who should be assigned to this ;)

#10 Updated by Dru Lavigne about 1 year ago

  • Subject changed from Zfs arc stats to Update module that reports ARC Hit Ratio
  • Status changed from Reviewed by Developer to Ready For Release
  • Target version changed from 11.2-BETA1 to 11.1

#11 Updated by Dru Lavigne 12 months ago

  • Status changed from Ready For Release to Resolved

#12 Updated by Stefan Schroepfer 10 months ago

Several users (including me) are seeing an odd or even erroneous ARC Hit Ratio reporting behavior. I'm not sure if this behavior was introduced with 11.1-RELEASE or 11.1-U1. It is just my guess that this behavior is a consequence of the changes made during processing bug #25966.

See also
https://forums.freenas.org/index.php?threads/arc-hit-ratio-all-over-the-place-after-upgrading-memory.61527/
for screenshots and a few contributions to the discussion.

#13 Updated by Dru Lavigne 10 months ago

Stefan: please open a new ticket and attach a debug to it from an affected system so that we can investigate. Thanks!

#14 Updated by Stefan Schroepfer 10 months ago

New ticket created (Bug #28489).

#15 Updated by Dru Lavigne 10 months ago

  • Related to Bug #28489: Discontinuous or bouncing graph in ARC Hit Ratio Reporting added

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