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2024 Feb 03
2
Slow ldap membership query in large active directory
...trieve the gidNumber of all the groups a user is a member of. This
request is sent about 3 to 4 times per second (yes, this is a design
flaw, but we cannot easily change it or enable caching):
We noticed that the query to get all the gidNumbers of the courses the
user is a member of takes about 370ms, while a simple query takes 47ms
(including bind/unbind). See the test results below.
Why is a query on the member attribute so expensive? I would have
assumed that this very common query would be optimised like an index
user => [groups], so that you only need to get the gidNumber attribute...