Default All Ids Threshold Value; Symptoms Of An Inappropriate All Ids Threshold Value - Netscape DIRECTORY SERVER 6.2 - ADMINISTRATOR Administrator's Manual

Managing Indexes

Default All IDs Threshold Value

By default, the Directory Server is set to an All IDs Threshold of 4000. This value
is suitable for a database of up to 80,000 entries. If you expect your databases to
be larger than 80,000 entries, we recommend that you change your all IDs
Threshold to a large value before populating your databases.
Symptoms of an Inappropriate All IDs Threshold
Value
When your All IDs Threshold is set incorrectly, you will see poor search
performance. However, poor search performance can be caused by other factors.
For example:
• Your users are performing a lot of searches for which you are not maintaining
an index.
• Your database cache size and entry cache size may be set incorrectly. See
Chapter 14, "Tuning Directory Server Performance" for more information.
Carefully examine these possibilities first before changing your All IDs Threshold
value.
If you think that your server is suffering from an All IDs Threshold that is too low,
look in your access log. See Chapter 12, "Monitoring Server and Database
Activity." Any searches that resulted in all entry IDs being returned will contain
the
notes=U
• Searches for which you are not maintaining an index
• Searches for which an ID list is not maintained because the All IDs Threshold
value has been reached for that index key
To determine whether the search result belongs to a search that should have been
indexed, you have to match the
previous SRCH line in your access log file. The SRCH line will show the search
filter that was used for the search request. If you have an index for the specified
search filter, then the notes=U flag results from the All IDs Threshold value being
reached for the index key. For example, the access log looks as follows:
[24/July/1998:15:12:20 -0800] conn=2 op=1 SRCH
base="o=example.com" scope=0 filter="(cn=James)"
[24/July/1998:15:12:20 -0800] conn=2 op=1 RESULT err=0 tag=101
nentries=10000 notes=U
394 Netscape Directory Server Administrator's Guide • December 2003
flag. The flag will be returned for:
notes=U
conn
and values from the RESULT line to a
op