RHEL Engineering is moving the tracking of its product development work on RHEL 6 through RHEL 9 to Red Hat Jira (issues.redhat.com). If you're a Red Hat customer, please continue to file support cases via the Red Hat customer portal. If you're not, please head to the "RHEL project" in Red Hat Jira and file new tickets here. Individual Bugzilla bugs in the statuses "NEW", "ASSIGNED", and "POST" are being migrated throughout September 2023. Bugs of Red Hat partners with an assigned Engineering Partner Manager (EPM) are migrated in late September as per pre-agreed dates. Bugs against components "kernel", "kernel-rt", and "kpatch" are only migrated if still in "NEW" or "ASSIGNED". If you cannot log in to RH Jira, please consult article #7032570. That failing, please send an e-mail to the RH Jira admins at rh-issues@redhat.com to troubleshoot your issue as a user management inquiry. The email creates a ServiceNow ticket with Red Hat. Individual Bugzilla bugs that are migrated will be moved to status "CLOSED", resolution "MIGRATED", and set with "MigratedToJIRA" in "Keywords". The link to the successor Jira issue will be found under "Links", have a little "two-footprint" icon next to it, and direct you to the "RHEL project" in Red Hat Jira (issue links are of type "https://issues.redhat.com/browse/RHEL-XXXX", where "X" is a digit). This same link will be available in a blue banner at the top of the page informing you that that bug has been migrated.

Created attachment 1024721 [details]
sosreport

Description of problem:
- 58000 entries in /etc/passwd and over 1200 in /etc/group.
The account-daemon, gnome-shell, and gnome-initial-setup process are all consuming large amounts of CPU and memory as they try to load all of those entries.  In addition, it appears that they're trying to iterate over all of the home directories looking for .face files.

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


How reproducible:
- 100%

Steps to Reproduce:
1. build a machine with 58000 user accounts that authenticate to active directory
2. attempt to boot machine to the GUI
3.

Actual results:
- account-daemon, gnome-shell and gnome-initial-setup consume the CPU

Expected results:
- no issues

Additional info:
- sosreport attached
- nsswitch.conf configuration issue has been corrected by no longer calling sssd
From:

passwd:     files sss
shadow:     files sss
group:      files sss
services:   files sss
netgroup:   files sss

To: 

passwd:     files 
shadow:     files 
group:      files 
services:   files 
netgroup:   files

Upstream bugs:
https://bugs.launchpad.net/ubuntu/+source/accountsservice/+bug/941673
https://utcc.utoronto.ca/~cks/space/blog/linux/UbuntuAccountsServiceProblems

I did a few changes here that should make it perform much better in a variety of large user deployments.

Unable to reproduce with accountsservice-0.6.35-12.el7.x86_64

*** Bug 1302349 has been marked as a duplicate of this bug. ***

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://rhn.redhat.com/errata/RHBA-2016-2522.html