[webmin-l] LDAP Users and Groups module performance

[Murray T. <mtr...@ce...>]

Hi Jamie

We now have over 1000 users we manage with the LDAP Users module.  I
have noticed lately that it is becoming very slow bringing up the
initial screen.  I can imagine things only getting worse as the
directory gets larger.  I haven't checked the queries My guess is that
the module tries to search the LDAP directory for the whole list of
users, then after realising there are too many, it then says there are
too many to display and fails.  Even if I set the maximum number of
users or groups to display to 0 or 1 it still takes a fair few seconds
to display the opening screen.  

The recommed method is to process each LDAP user entry one at a time as
they are returned. The module would stop when it reached the limit of
users for that page which could be a configuration value.  The module
appears to be using the NET::LDAP library.  I had a look at the
documentation below and they recommend processing each entry as it is
returned:  

http://search.cpan.org/~gbarr/perl-ldap-0.33/lib/Net/LDAP/FAQ.pod#USING_THE_CALLBACK_SUBROUTINE_APPROACH

If we want 100 users to be displayed on the page we print the first 100
entries then quit.  If we want users 100-200 we would ignore the first
hundred entries and print the second hundred, and so on.

Hope the above idea has merit and its possible for you to implement at
some stage.

Thanks

Murray Trainer