search for: ldb_lmdb

Hi all. I have samba 4.2.3 on freebsd 10.1 server. There are three DC and about 350 PC on domain. DCs have 3 CPU and 3GB RAM. Some servers with services like apache, exim, dovecot, etc use samba4 ldap (port 389) for user authentication. Some times ago after adding some services to use ldap I found, that samba4 cannot serve all ldap requests. Every 10-30 minutes I see in DCs logs: dc1 kernel:

.... It hasn't ever been used in that combination, but interested parties could put it back, add a test and see if it helps. More likely to help (but more effort) are merging the ldb_perfs branch, profiling the rest of the code in search of performance issues, replacing the ldb_tdb backend with ldb_lmdb. However, I would go back to looking at the sources of the queries - if your DB is constantly under full-DB scan, it will very likely show symptoms like you see. Thanks, Andrew Bartlett -- Andrew Bartlett http://samba.org/~abartlet/ Authentication Developer, Samba Team...

...een used in that combination, but interested > parties could put it back, add a test and see if it helps. > > More likely to help (but more effort) are merging the ldb_perfs branch, > profiling the rest of the code in search of performance issues, > replacing the ldb_tdb backend with ldb_lmdb. > > However, I would go back to looking at the sources of the queries - if > your DB is constantly under full-DB scan, it will very likely show > symptoms like you see. > > Thanks, > > Andrew Bartlett > Thanks for answer. I had found that high load to ldap was generated...