Hi Claas,
I do not recall a specific change 1.4.4 vs 2.0 that could explain this.
Do you confirm that 'uniqueMember' is indexed in equality on both ? What
are the SRCH records in the access logs (notes=A ?).
On 2.0, it lasts 2sec, you may try to capture few pstacks that would
give some tips.
regards
thierry
On 3/7/23 14:54, Claas Vieler wrote:
Hello,
we have a search performance problem when we migrated from 1.4.4.19 to
2.0.17.
Our environment has about 100k entries, about 15k users and about 10k
groups. Also big groups with thousand of users, also users with
thousand of group membership. So I would call it a small instance
On 1.4.x query perfomance ist fine:
ldapsearch for
"(uniqueMember=cn=sampleuser,ou=People,dc=example,dc=com) dn " via
LDAPI on 1.4.x takes approx 0,01-0,03 sec.
This user is member of approx. 500 groups.
I tested two migration methods:
1. via replication
After initializing replica, the same query takes about _8_ sec.
So I reindexed db (dsctl .. db2index) and get durations for the query
from 2-3 sec.
2. via ldif export/import
after importing, the same query takes about 2-3 sec
But even with 2-3 sec, we talk about 2.x perfomance ten time slower
than 1.4.x.
Is this a know issue? I compared all cache-settings and found no
differences.
I have no more ideas how to optimize this. Should we wait for 2.x when
its adopted to new lmdb?
thanks
Claas
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