While reviewing the query log for a DSA, you may be wondering why do I see 'eis' and what it represents.
 20190203.205835.516 234.56898 SEARCH dn="ou=GI,ou=external,dc=mycompany,dc=com" scope=one-level eis=all
 20190203.205835.540 1744.1011117 SEARCH dn="uid=30362258,ou=XYZ,ou=external,dc=mycompany,dc=com" scope=base-object eis=1
eis stands for "entry information selection".
Basically, in a search filter, the entry information selection (EIS) is the attributes that are to be returned in the search results. This feature is enabled with you have following defined.
set query-log-advanced = all;
set query-log-advanced = show-eis;
You most probaly have the first one set.