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ldb: create a cache of known wellknown objects instead of continously searching in the db

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Profiling on dbcheck have shown that we spend 10% of the time looking
for wellknown objects.

BUG: https://bugzilla.samba.org/show_bug.cgi?id=10973

Change-Id: I13ed58e8062d1b7b6179d17b0e7e56f943572c6c
Signed-off-by: Matthieu Patou <mat@matws.net>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
This commit is contained in:
Matthieu Patou 2015-05-25 09:17:55 -07:00 committed by Stefan Metzmacher
parent c049106bf8
commit 6122acad0f
1 changed files with 14 additions and 1 deletions
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15
python/samba/samdb.py
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@ -39,6 +39,7 @@ class SamDB(samba.Ldb):
"""The SAM database.""" """The SAM database."""
hash_oid_name = {} hash_oid_name = {}
hash_well_known = {}
def __init__(self, url=None, lp=None, modules_dir=None, session_info=None, def __init__(self, url=None, lp=None, modules_dir=None, session_info=None,
credentials=None, flags=0, options=None, global_schema=True, credentials=None, flags=0, options=None, global_schema=True,
@ -793,7 +794,19 @@ accountExpires: %u
return dsdb._dsdb_get_nc_root(self, dn) return dsdb._dsdb_get_nc_root(self, dn)
def get_wellknown_dn(self, nc_root, wkguid): def get_wellknown_dn(self, nc_root, wkguid):
return dsdb._dsdb_get_wellknown_dn(self, nc_root, wkguid) h_nc = self.hash_well_known.get(str(nc_root))
dn = None
if h_nc is not None:
dn = h_nc.get(wkguid)
if dn is None:
dn = dsdb._dsdb_get_wellknown_dn(self, nc_root, wkguid)
if dn is None:
return dn
if h_nc is None:
self.hash_well_known[str(nc_root)] = {}
h_nc = self.hash_well_known[str(nc_root)]
h_nc[wkguid] = dn
return dn
def set_minPwdAge(self, value): def set_minPwdAge(self, value):
m = ldb.Message() m = ldb.Message()