Bug 1285901

Summary: nunc-stans creates additional thread pool
Product: Red Hat Enterprise Linux 7 Reporter: Viktor Ashirov <vashirov>
Component: 389-ds-baseAssignee: Noriko Hosoi <nhosoi>
Status: CLOSED NOTABUG QA Contact: Viktor Ashirov <vashirov>
Severity: unspecified Docs Contact:
Priority: unspecified    
Version: 7.3CC: mreynolds, nkinder, rmeggins
Target Milestone: rc   
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Hardware: Unspecified   
OS: Unspecified   
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Fixed In Version: Doc Type: Bug Fix
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Clone Of: Environment:
Last Closed: 2015-12-22 21:34:28 UTC Type: Bug
Regression: --- Mount Type: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description Viktor Ashirov 2015-11-26 23:00:40 UTC 
Description of problem:
Build 389-ds-base-1.3.4.0-21.el7_2.x86_64:
# tail -n1 /etc/profile
export MAX_THREADS=100

nsslapd-threadnumber: 30
nsslapd-enable-nunc-stans: off

# ps huH p $(pidof ns-slapd) | wc -l
41

nsslapd-enable-nunc-stans: on
# ps huH p $(pidof ns-slapd) | wc -l
72

# ldapsearch -h localhost -D "cn=Directory Manager" -w Secret123 -b "cn=monitor" -s base  threads  -LLL
dn: cn=monitor
threads: 30

On the older version (389-ds-base-1.3.4.0-19.el7.x86_64):

nsslapd-enable-nunc-stans: off
# ps huH p $(pidof ns-slapd) | wc -l
41

nsslapd-enable-nunc-stans: on
# ps huH p $(pidof ns-slapd) | wc -l
142

# ldapsearch -h localhost -D "cn=Directory Manager" -w Secret123 -b "cn=monitor" -s base  threads  -LLL
dn: cn=monitor
threads: 30

Looks like nunc-stans created additional thread pool (30 + 100 + 12 service threads). And on a new version it's 30 + 30 + 12.
Comment 1 mreynolds 2015-12-22 21:34:28 UTC 
Nunc-stans creates its own event catching thread pool, and it uses the DS thread number config setting.  So you should see double the number of threads.

Closing this out as not a bug, feel free to reopen it if I missed something.