Bug 1662034
| Summary: | pmlogger_daily run "find . -daystart -name NoSuchFile" over all NFS mounts... | ||
|---|---|---|---|
| Product: | [Fedora] Fedora | Reporter: | Edgar Hoch <edgar.hoch> |
| Component: | pcp | Assignee: | Nathan Scott <nathans> |
| Status: | CLOSED ERRATA | QA Contact: | Fedora Extras Quality Assurance <extras-qa> |
| Severity: | high | Docs Contact: | |
| Priority: | unspecified | ||
| Version: | 29 | CC: | brolley, fche, lberk, mgoodwin, mleitner, nathans, scox |
| Target Milestone: | --- | ||
| Target Release: | --- | ||
| Hardware: | x86_64 | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | pcp-4.3.0-2.fc28 pcp-4.3.0-2.fc29 | Doc Type: | If docs needed, set a value |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2019-01-02 02:36:55 UTC | Type: | Bug |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
I have created an upstream issue: https://github.com/performancecopilot/pcp/issues/597 pcp-4.3.0-2.fc29 has been submitted as an update to Fedora 29. https://bodhi.fedoraproject.org/updates/FEDORA-2018-fe21afd0ec pcp-4.3.0-2.fc28 has been submitted as an update to Fedora 28. https://bodhi.fedoraproject.org/updates/FEDORA-2018-0913e3af78 pcp-4.3.0-2.fc29 has been pushed to the Fedora 29 testing repository. If problems still persist, please make note of it in this bug report. See https://fedoraproject.org/wiki/QA:Updates_Testing for instructions on how to install test updates. You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2018-fe21afd0ec pcp-4.3.0-2.fc28 has been pushed to the Fedora 28 testing repository. If problems still persist, please make note of it in this bug report. See https://fedoraproject.org/wiki/QA:Updates_Testing for instructions on how to install test updates. You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2018-0913e3af78 pcp-4.3.0-2.fc28 has been pushed to the Fedora 28 stable repository. If problems still persist, please make note of it in this bug report. pcp-4.3.0-2.fc29 has been pushed to the Fedora 29 stable repository. If problems still persist, please make note of it in this bug report. |
Description of problem: Today I was wondering why many of our new installed systems has a load not lower than 1. I found that all have a "find" process running doing high io: find . -daystart -name NoSuchFile The process has a cwd of "/", this means it searches every directory in the tree, even all nfs mounted directories! In our environment this creates a useless unnecessary high load on our nfs servers, because many nfs clients run the same find command at the same time all days! This are the process tree that call the find process: systemd --system --deserialize 55 └─pmlogger /usr/share/pcp/lib/pmlogger start └─pmlogger_check /usr/libexec/pcp/bin/pmlogger_check -V └─pmlogger_daily /usr/libexec/pcp/bin/pmlogger_daily -K -V └─find . -daystart -name NoSuchFile /usr/libexec/pcp/bin/pmlogger_daily contains the line find . -daystart -name NoSuchFile >/dev/null 2>&1 && FIND_DAYSTART="-daystart" Who writes such horrible code and releases it to the world? This line is new in pcp 4.3.0: https://github.com/performancecopilot/pcp/commit/7570a314ed657589f31830dc880d811b6ff589e9 Please do not run find every day on / without restricting to a) local filesystems, b) a small subdirectory! It creates a unnecessary load to systems that reduces the performance for the users, and that stresses the disks (and in this case the network and nfs servers too). Version-Release number of selected component (if applicable): pcp-4.3.0-1.fc29.x86_64 How reproducible: Always. Steps to Reproduce: 1. Install (current version of) pcp. 2. Wait. Actual results: Extra load because of long running find command. Expected results: No extra load.