How to improve jsp load time?

Hi everyone --
Got a question for all of you.
I have a form in a JSP, which does a (Oracle 9i) db lookup on 13 fields and populates the drop-down boxes. The load time for the JSP is slooooww.
These are my options for speeding up the load time (I think):
1. When the web/app server starts the application, have it do all the db lookups and store the resultsets...somewhere. Maybe have some dblistener thread that periodically checks for updates to the db. Then, when someone actually requests the JSP, all the JSP has to do is read the pre-populated drop-down boxes and load.
2. Wait until someone requests the JSP and store all the resultsets as cookies for the session. The resultsets will be good for the home JSP and its sister. This doesn't really solve the problem, since the initial load will still be slow.
3. Combine all the lookup statements into one huge statement, and store the results somewhere. This method queries the db only once, and the drop-down boxes can be populated from one query (instead of 13 separate connections and queries).
All of these ideas seem mediocre to me, and they don't address the fact that the results of the queries change contantly. What I need is a
way to make the JSP load quickly and with the most current information.
Does anyone have any ideas? Which of my suggestions is rather boneheaded?
Thanks for any advice,
-Kwj

It's still not perfect, but it's better at least.
I'm querying 4 different tables overall, and I have a Db class that the jsp instantiates.
from home.jsp:
Db d = new Db();
ResultSet [] all = d.getAll();
<body>
%>
<tr><td align=right>Correspondence ID: </td><td><select>
<option label=""></option>
<%
    rs = all [1];
    while(rs.next()){
%>
        <option><%=rs.getString("sak_correspondence")%></option>
<%
%>
</select></td>
</body>
[\code]
from Db.java:public ResultSet [] getAll() throws SQLException
ResultSet [] all = new ResultSet [4];
all [0] = con.prepareStatement
("select nam_category from doco.corr_category " +
"order by nam_category asc").executeQuery();
all [1] = con.prepareStatement
("select sak_correspondence, dte_received, dte_response_due, " +
"dte_sent, file_path, id_outref, subject " +
"from doco.correspondence").executeQuery();
all [2] = con.prepareStatement
("select nam from doco.corr_type order by nam asc").executeQuery();
all [3] = con.prepareStatement
("select nam_subcategory from doco.corr_subcategory " +
"order by nam_subcategory asc").executeQuery();
return all;
}//getAll()

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Thanks a lot for your support. I’m just a little confused.
I will use an example to illustrate my problem a bit more clearly.
This is the basic table, in my case a view, which is queried by all 14 rules files:
column1 --- column2 --- column3 --- column4 --- ... ---column n
dim 1 --- dim 2 --- dim 3 --- data1 --- data2 --- data3 --- ... --- data 14
Region -- ID --- Product --- sales --- cogs ---- discounts --- ... --- amount
West --- D1 --- Coffee --- 11001 --- 1,322 --- 10789 --- ... --- 548
West --- D2 --- Tea10 --- 12011 --- 1,325 --- 10548 --- ... --- 589
West --- S1 --- Tea10 --- 14115 --- 1,699 --- 10145 --- ... --- 852
West --- C3 --- Tea10 --- 21053 --- 1,588 --- 10998 --- ... --- 981
East ---- S2 --- Coffee --- 15563 --- 1,458 --- 10991 --- ... --- 876
East ---- D1 --- Tea10 --- 15894 --- 1,664 --- 11615 --- ... --- 156
East ---- D3 --- Coffee --- 19689 --- 1,989 --- 15615 --- ... --- 986
East ---- C1 --- Coffee --- 18897 --- 1,988 --- 11898 --- ... --- 256
East ---- C3 --- Tea10 --- 11699 --- 1,328 --- 12156 --- ... --- 9896
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Rules File1:
dim 1 --- dim 2 --- dim 3 --- sales --- ignore --- ignore --- ... --- ignore
Rules File2:
dim 1 --- dim 2 --- dim 3 --- ignore --- cogs --- ignore --- ... --- ignore
Rules File14:
dim 1 --- dim 2 --- dim 3 --- ignore --- ignore --- ignore --- ... --- amount
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Am I right that the other way is to reconstruct the table/view (and the rules files) like follows to load all of the data in one pass:
dim 0 --- dim 1 --- dim 2 --- dim 3 --- data
Account --- Region -- ID --- Product --- data
sales --- West --- D1 --- Coffee --- 11001
sales --- West --- D2 --- Tea10 --- 12011
sales --- West --- S1 --- Tea10 --- 14115
sales --- West --- C3 --- Tea10 --- 21053
sales --- East ---- S2 --- Coffee --- 15563
sales --- East ---- D1 --- Tea10 --- 15894
sales --- East ---- D3 --- Coffee --- 19689
sales --- East ---- C1 --- Coffee --- 18897
sales --- East ---- C3 --- Tea10 --- 11699
cogs --- West --- D1 --- Coffee --- 1,322
cogs --- West --- D2 --- Tea10 --- 1,325
cogs --- West --- S1 --- Tea10 --- 1,699
cogs --- West --- C3 --- Tea10 --- 1,588
cogs --- East ---- S2 --- Coffee --- 1,458
cogs --- East ---- D1 --- Tea10 --- 1,664
cogs --- East ---- D3 --- Coffee --- 1,989
cogs --- East ---- C1 --- Coffee --- 1,988
cogs --- East ---- C3 --- Tea10 --- 1,328
discounts --- West --- D1 --- Coffee --- 10789
discounts --- West --- D2 --- Tea10 --- 10548
discounts --- West --- S1 --- Tea10 --- 10145
discounts --- West --- C3 --- Tea10 --- 10998
discounts --- East ---- S2 --- Coffee --- 10991
discounts --- East ---- D1 --- Tea10 --- 11615
discounts --- East ---- D3 --- Coffee --- 15615
discounts --- East ---- C1 --- Coffee --- 11898
discounts --- East ---- C3 --- Tea10 --- 12156
amount --- West --- D1 --- Coffee --- 548
amount --- West --- D2 --- Tea10 --- 589
amount --- West --- S1 --- Tea10 --- 852
amount --- West --- C3 --- Tea10 --- 981
amount --- East ---- S2 --- Coffee --- 876
amount --- East ---- D1 --- Tea10 --- 156
amount --- East ---- D3 --- Coffee --- 986
amount --- East ---- C1 --- Coffee --- 256
amount --- East ---- C3 --- Tea10 --- 9896
And the third way is to adjust the essbase.cfg parameters DLTHREADSPREPARE and DLTHREADSWRITE (and DLSINGLETHREADPERSTAGE)
I just want to be sure that I understand your suggestions.
Many thanks for awesome help,
Zeljko

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Dimo

Hi,
do you have any ideas how we can improve the class-loading performance on a weblogic 12c running on jrockit? We spend about 20-30 ms per request in class-loading due to the way hibernate criteria API works (it tries to load quite a lot of missing classes). The only thing I came up with was to invert the class-loading using the weblogic descriptor for those missing classes (which are actually no real classes but some parts of a generated JPQL) which does improve performance a bit.
Thanks
Dimo

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