Note: This bug is displayed in read-only format because the product is no longer active in Red Hat Bugzilla.

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.

Bug 2224505

Summary:	Paged search impacts performance [8.9.0]
Product:	Red Hat Enterprise Linux 8	Reporter:	Viktor Ashirov <vashirov>
Component:	389-ds-base	Assignee:	Pierre Rogier <progier>
Status:	CLOSED ERRATA	QA Contact:	LDAP QA Team <idm-ds-qe-bugs>
Severity:	high	Docs Contact:
Priority:	high
Version:	8.9	CC:	bsmejkal, emartyny, idm-ds-dev-bugs, idm-ds-qe-bugs, jonmoore, mreynolds, mrhodes, pasik, progier, tbordaz, tmihinto, vashirov
Target Milestone:	rc	Keywords:	Reopened, Triaged, ZStream
Target Release:	---	Flags:	pm-rhel: mirror+
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:	sync-to-jira
Fixed In Version:	389-ds-1.4-820230816162424-17499975	Doc Type:	Bug Fix
Doc Text:	.Paged searches from a regular user now do not impact performance Previously, when Directory Server was under the search load, paged searches from a regular user could impact the server performance because a lock conflicted with the thread that polls for network events. In addition, if a network issue occurred while sending the page search, the whole server was unresponsive until the `nsslapd-iotimeout` parameter expired. With this update, the lock was split into several parts to avoid the contention with the network events. As a result, no performance impact during paged searches from a regular user.	Story Points:	---
Clone Of:	1974242
Clones:	2232420 2247082 (view as bug list)		Environment:
Last Closed:	2023-11-14 15:32:25 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:
Bug Depends On:	1974242, 2224507, 2251374, 2265544
Bug Blocks:	2232420, 2247082

Comment 6 Viktor Ashirov 2023-08-21 13:56:48 UTC

Build tested: 389-ds-base-1.4.3.37-1.module+el8.9.0+19689+7d653af8.x86_64

I still see a big drop in performance:

Baseline:
ldclt -D "uid=test,ou=people,dc=example,dc=com" -w password -e bindeach,esearch -b "ou=people,dc=example,dc=com" -f "uid=user00001" 
ldclt[9084]: Average rate: 2630.00/thr  (2630.00/sec), total:  26300
ldclt[9084]: Average rate: 2642.40/thr  (2642.40/sec), total:  26424
ldclt[9084]: Average rate: 2593.20/thr  (2593.20/sec), total:  25932
ldclt[9084]: Average rate: 2649.50/thr  (2649.50/sec), total:  26495
ldclt[9084]: Average rate: 2138.70/thr  (2138.70/sec), total:  21387

PR search started in parallel to ldclt.
A normal user:
while : ; do ldapsearch -D "uid=test,ou=people,dc=example,dc=com" -w password -b dc=example,dc=com 'uid=*' -E pr=100/noprompt > /dev/null; done
ldclt[9084]: Average rate: 1062.90/thr  (1062.90/sec), total:  10629
ldclt[9084]: Average rate: 1049.20/thr  (1049.20/sec), total:  10492
ldclt[9084]: Average rate: 1015.80/thr  (1015.80/sec), total:  10158
ldclt[9084]: Average rate: 1048.50/thr  (1048.50/sec), total:  10485
ldclt[9084]: Average rate: 1046.00/thr  (1046.00/sec), total:  10460

Directory Manager:
while : ; do ldapsearch -D "cn=Directory Manager" -w password -b dc=example,dc=com 'uid=*' -E pr=100/noprompt > /dev/null; done
ldclt[9084]: Average rate:  617.10/thr  ( 617.10/sec), total:   6171
ldclt[9084]: Average rate:  604.30/thr  ( 604.30/sec), total:   6043
ldclt[9084]: Average rate:  590.60/thr  ( 590.60/sec), total:   5906
ldclt[9084]: Average rate:  587.90/thr  ( 587.90/sec), total:   5879

Anonymous user:
while : ; do ldapsearch -x -b dc=example,dc=com 'uid=*' -E pr=100/noprompt > /dev/null; done
ldclt[9084]: Average rate: 1070.60/thr  (1070.60/sec), total:  10706
ldclt[9084]: Average rate: 1062.00/thr  (1062.00/sec), total:  10620
ldclt[9084]: Average rate: 1095.40/thr  (1095.40/sec), total:  10954
ldclt[9084]: Average rate: 1089.10/thr  (1089.10/sec), total:  10891


Moving to ASSIGNED.

Comment 8 Viktor Ashirov 2023-08-24 10:54:21 UTC

Comparing with the older version I see an improvement:

Baseline
ldclt -D "uid=test,ou=people,dc=example,dc=com" -w password -e bindeach,esearch -b "ou=people,dc=example,dc=com" -f "uid=user00001"
389-ds-base-1.4.3.36-2.module+el8.9.0+19332+3ffa8e10.x86_64
ldclt[8796]: Average rate: 2749.50/thr  (2749.50/sec), total:  27495
ldclt[8796]: Average rate: 2921.00/thr  (2921.00/sec), total:  29210
ldclt[8796]: Average rate: 2807.20/thr  (2807.20/sec), total:  28072
ldclt[8796]: Average rate: 2817.80/thr  (2817.80/sec), total:  28178
ldclt[8796]: Average rate: 2691.10/thr  (2691.10/sec), total:  26911

389-ds-base-1.4.3.37-1.module+el8.9.0+19689+7d653af8.x86_64
ldclt[13571]: Average rate: 2876.00/thr  (2876.00/sec), total:  28760
ldclt[13571]: Average rate: 2844.70/thr  (2844.70/sec), total:  28447
ldclt[13571]: Average rate: 2920.80/thr  (2920.80/sec), total:  29208
ldclt[13571]: Average rate: 2898.90/thr  (2898.90/sec), total:  28989
ldclt[13571]: Average rate: 2828.80/thr  (2828.80/sec), total:  28288

PR search started in parallel to ldclt.
A normal user:
while : ; do ldapsearch -D "uid=test,ou=people,dc=example,dc=com" -w password -b dc=example,dc=com 'uid=*' -E pr=100/noprompt > /dev/null; done
389-ds-base-1.4.3.36-2.module+el8.9.0+19332+3ffa8e10.x86_64
ldclt[8796]: Average rate:  586.60/thr  ( 586.60/sec), total:   5866
ldclt[8796]: Average rate:  626.20/thr  ( 626.20/sec), total:   6262
ldclt[8796]: Average rate:  610.50/thr  ( 610.50/sec), total:   6105
ldclt[8796]: Average rate:  563.30/thr  ( 563.30/sec), total:   5633

389-ds-base-1.4.3.37-1.module+el8.9.0+19689+7d653af8.x86_64
ldclt[13571]: Average rate:  726.00/thr  ( 726.00/sec), total:   7260
ldclt[13571]: Average rate:  733.90/thr  ( 733.90/sec), total:   7339
ldclt[13571]: Average rate:  741.00/thr  ( 741.00/sec), total:   7410
ldclt[13571]: Average rate:  717.90/thr  ( 717.90/sec), total:   7179

Directory Manager:
while : ; do ldapsearch -D "cn=Directory Manager" -w password -b dc=example,dc=com 'uid=*' -E pr=100/noprompt > /dev/null; done
389-ds-base-1.4.3.36-2.module+el8.9.0+19332+3ffa8e10.x86_64
ldclt[8796]: Average rate:  191.30/thr  ( 191.30/sec), total:   1913
ldclt[8796]: Average rate:  206.70/thr  ( 206.70/sec), total:   2067
ldclt[8796]: Average rate:  193.10/thr  ( 193.10/sec), total:   1931
ldclt[8796]: Average rate:  204.40/thr  ( 204.40/sec), total:   2044
ldclt[8796]: Average rate:  201.70/thr  ( 201.70/sec), total:   2017

389-ds-base-1.4.3.37-1.module+el8.9.0+19689+7d653af8.x86_64
ldclt[13571]: Average rate:  680.20/thr  ( 680.20/sec), total:   6802
ldclt[13571]: Average rate:  627.90/thr  ( 627.90/sec), total:   6279
ldclt[13571]: Average rate:  607.20/thr  ( 607.20/sec), total:   6072
ldclt[13571]: Average rate:  589.10/thr  ( 589.10/sec), total:   5891
ldclt[13571]: Average rate:  586.80/thr  ( 586.80/sec), total:   5868


Marking as VERIFIED.

Comment 17 errata-xmlrpc 2023-11-14 15:32:25 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 (389-ds:1.4 bug fix and enhancement update), 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-2023:6965