Query time lengthened after additional indexes added

Question

I had been frequently getting results from my query in about .5 - 1.5 seconds. However, I added additional indexes to my container on fields that I am not even using in my query at the moment. When I did this, my query went to about 35 seconds. Can anyone tell me how to fix this problem
Here is my query:
for $record in collection("Catalog.dbxml")
/*[T245[contains(.,"augustine") or contains(.,"Augustine") or contains(.,"AUGUSTINE")]] return $record
Here are my indexes:
Index: node-element-substring-string for node {}:T050
Index: node-element-substring-string for node {}:T090
Index: node-element-substring-string for node {}:T100
Index: node-element-substring-string for node {}:T110
Index: node-element-substring-string for node {}:T111
Index: node-element-substring-string for node {}:T245
Index: node-element-substring-string for node {}:T246
Index: node-element-substring-string for node {}:T700
Index: node-element-substring-string for node {}:T710
Index: node-element-substring-string for node {}:T711
Here is my queryplan:
<XQuery>
<Navigation>
<QueryPlanFunction result="collection" container="Catalog5.dbxml">
<OQPlan>n(V(node-element-substring-string,T245,=,'ine'),V(node-element-substring-string,T245,=,'tin'),V(node-element-substring-string,T245,=,'sti'),V(node-element-substring-string,T245,=,'ust'),V(node-element-substring-string,T245,=,'gus'),V(node-element-substring-string,T245,=,'aug'),V(node-element-substring-string,T245,=,'ugu'))</OQPlan>
</QueryPlanFunction>
<Step axis="child" uri="*" name="*" nodeType="element"/>
<DbXmlFilter>
<Navigation>
<Step axis="child" name="T245" nodeType="element">
<Predicates>
<Operator name="or">
<Navigation>
<DbXmlContains>
<OQPlan>n(V(node-element-substring-string,T245,=,'ugu'),V(node-element-substring-string,T245,=,'gus'),V(node-element-substring-string,T245,=,'ine'),V(node-element-substring-string,T245,=,'sti'),V(node-element-substring-string,T245,=,'tin'),V(node-element-substring-string,T245,=,'ust'),V(node-element-substring-string,T245,=,'aug'))</OQPlan>
<Sequence>
<AnyAtomicTypeConstructor value="augustine" typeuri="http://www.w3.org/2001/XMLSchema" typename="string"/>
</Sequence>
</DbXmlContains>
</Navigation>
<Navigation>
<DbXmlContains>
<OQPlan>n(V(node-element-substring-string,T245,=,'ine'),V(node-element-substring-string,T245,=,'tin'),V(node-element-substring-string,T245,=,'ust'),V(node-element-substring-string,T245,=,'sti'),V(node-element-substring-string,T245,=,'gus'),V(node-element-substring-string,T245,=,'ugu'),V(node-element-substring-string,T245,=,'aug'))</OQPlan>
<Sequence>
<AnyAtomicTypeConstructor value="Augustine" typeuri="http://www.w3.org/2001/XMLSchema" typename="string"/>
</Sequence>
</DbXmlContains>
</Navigation>
<Navigation>
<DbXmlContains>
<OQPlan>n(V(node-element-substring-string,T245,=,'ust'),V(node-element-substring-string,T245,=,'aug'),V(node-element-substring-string,T245,=,'ugu'),V(node-element-substring-string,T245,=,'gus'),V(node-element-substring-string,T245,=,'tin'),V(node-element-substring-string,T245,=,'sti'),V(node-element-substring-string,T245,=,'ine'))</OQPlan>
<Sequence>
<AnyAtomicTypeConstructor value="AUGUSTINE" typeuri="http://www.w3.org/2001/XMLSchema" typename="string"/>
</Sequence>
</DbXmlContains>
</Navigation>
</Operator>
</Predicates>
</Step>
</Navigation>
</DbXmlFilter>
</Navigation>
</XQuery>

Answer 1

Hi Andrew,
You experience surprises me a little - I'd like to look into reproducing what you are seeing.
Can you tell me which indexes you had to start with and which indexes you then added to cause the slow down? Is it possible for you to send me some sample data that exhibits this behavior - either the XML, or your container? If so, can you upload it to ftp.sleepycat.com/incoming and let me know what you've named the file.
Thanks,
John