Re: How do I verify that Openldap is using multiple threads on Freebsd5.2

[jehan procaccia <jehan.procaccia@int-evry.fr>]

Pierangelo Masarati wrote:

> James Saint-Rossy, Thomas wrote:
>
> > I am trying to verify that my server running "FreeBSD 5.2.1-RELEASE" 
> > is actually using multiple threads for Openldap.  The system has dual 
> > p4's with hyper threading.  I've been searching the web and archive 
> > with no luck.  Any insight would be appreciated.
> >
> > When I do ps -axH all I get back is one process:
> > 73670  ??  SLs    0:04.19 /usr/local/libexec/slapd -h 
> > ldapi://%2fvar%2frun%2fopenldap%2fldapi/ ldap://0.0.0.0/ -u ldap -g ldap
On my linux fedora core 2 this (ps -axH) returns each and every threads !
$ ps axH | grep slapd |wc -l
24

did you ask for multiple thread in slapd.conf, here's mine
$ grep thread /etc/openldap/slapd.conf
threads 22

Indeed monitor database can help:

$ ldapsearch -x -H ldap://:389 -b "cn=Threads,cn=Monitor" -D 
"cn=admin,dc=int-ev
ry,dc=fr" -W -LLL
Enter LDAP Password:
dn: cn=Threads,cn=Monitor
objectClass: top
objectClass: monitor
objectClass: extensibleObject
cn: Threads
description: max=22
description: backload=1


> > Top -H is similar and appears to only be using one of the processors 
> > at a time
> > 70022 ldap          96    0   182M 62380K select 3   1:09  0.00%  
> > 0.00% slapd
> >
> > The FreeBSD port seems to be passing "--with-threads=posix" to 
> > configure so I assume it's compiled with threads
> >
> > Thanks, James Saint-Rossy.
>
>
>
> Depending on the version of OpenLDAP, you can search for attribute 
> "monitoredInfo" under "cn=Max,cn=Threads,cn=Monitor"; this should tell 
> you how many threads slapd is configure to use at most.  I don't know 
> what it's supposed to return if compiled without threads, but on my 
> test system HEAD returns
>
> [masarati@ando tests]$ ../clients/tools/ldapsearch -x -H ldap://:9011 
> -b cn=max,cn=Threads,cn=monitor @extensibleobject
> # extended LDIF
> #
> # LDAPv3
> # base <cn=max,cn=Threads,cn=monitor> with scope subtree
> # filter: (objectclass=*)
> # requesting: @extensibleobject
> #
>
> # Max, Threads, Monitor
> dn: cn=Max,cn=Threads,cn=Monitor
> objectClass: monitoredObject
> structuralObjectClass: monitoredObject
> cn: Max
> monitoredInfo: 16
> creatorsName: cn=anonymous
> modifiersName: cn=anonymous
> createTimestamp: 20041008215245Z
> modifyTimestamp: 20041008215245Z
> entryDN: cn=Max,cn=Threads,cn=Monitor
> subschemaSubentry: cn=Subschema
> hasSubordinates: FALSE
>
> # search result
> search: 2
> result: 0 Success
>
> # numResponses: 2
> # numEntries: 1
>
> p.
>
>
>
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