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Re: search / add operations suddenly became hopelessly slow
Hi List.
I posted the message below several days ago.
I found workaround for the problem described, maybe not very smart one. Post
it just in case if someone is interested.
Dumping the whole DB with slapcat and loading it back with slapadd solved
the problem.
But I still have no understanding of what happened with DB... Any hints
would be highly appreciated.
Alexei.
----- Original Message -----
From: "Alexei Monastyrnyi" <alexeim@orcsoftware.com>
To: <openldap-software@OpenLDAP.org>
Sent: Wednesday, March 24, 2004 5:48 PM
Subject: search / add operations suddenly became hopelessly slow
> Hi List!
> I've got a problem with search / add operations on OpenLDAP server (using
> version 2.1.25 + BDB 4.1.25 on Solaris 9).
>
> The following operation with result in 20 lines takes 15 sec... which took
> ten times less before.
>
> /usr/local/bin/ldapsearch -LLL -s one -b "ou=Group,dc=orcsoftware,dc=com"
> "(cn=*)" dn | awk '{ print $2 }' > group.1~
>
> LDAP DB is not that big, maximum 500 items in ou=People, all the rest is
> much smaller...
>
> I tried to reindex DB, still waiting for results... slapindex is being
> running for 4 hours on such a small DB. truss shows that slapindex is
doing
> something with index files in openldap-data dir.
>
> I have the same OpenLDAP configuration on different server with the same
DB
> and it works like a dream.
>
> It worked perfectly before but one day it suddenly became slow. Nothing
> critical was done no the system at that particular moment (recommended
> patch_cluster was installed several days earlier but logs showed that was
OK
> with search/add operations timing several days after that).
>
> Turning on loglevel to -1 I can see big delay (7 sec) during the search
> operation above.
>
> ...
> Mar 24 15:40:32 ra slapd[23392]: [ID 934353 local4.debug] =>
> bdb_filter_candidat
> es
> Mar 24 15:40:32 ra slapd[23392]: [ID 873669 local4.debug] PRESENT
> Mar 24 15:40:32 ra slapd[23392]: [ID 578218 local4.debug] =>
> bdb_presence_candid
> ates (cn)
> Mar 24 15:40:33 ra slapd[23392]: [ID 336836 local4.debug] => key_read
> Mar 24 15:40:33 ra slapd[23392]: [ID 187165 local4.debug]
bdb_idl_fetch_key:
> [00
> 000001]
> !!!!!!!!!!!!!!!! delay !!!!!!!!!!!!!!!!
> Mar 24 15:40:40 ra slapd[23392]: [ID 766657 local4.debug] <=
bdb_index_read
> 1590
> candidates
> Mar 24 15:40:40 ra slapd[23392]: [ID 366904 local4.debug] <=
> bdb_presence_candid
> ates: id=1590 first=9 last=23897
> Mar 24 15:40:40 ra slapd[23392]: [ID 730587 local4.debug] <=
> bdb_filter_candidat
> es: id=1590 first=9 last=23897
> ...
>
> I think there is some issue with database but cannot understand what is
> wrong...
>
> Any hint would be highly appreciated.
>
> Sincerely,
> Alexei Monastyrnyi,
> System Engineer,
> Orc Software AB.
> Birger Jarlsgatan 32A Box 7742 Reception +46 8 407 38 00
> SE-103 95 Stockholm Sweden Fax +46 8 407 38 01
> www.orcsoftware.com Direct +46 8 407 38 02
> alexeim@orcsoftware.com Mobile +46 70 377 5777
>