KM Performance with DB Repository of 2TB

Hello,
our customer is planing to store large amount of small documents (500kb - 1 MB). Calculations show that we would hit 2,2 TB (Terrabyte) in a timeframe of a year. Is KM capable to store such a huge amount? Until now we host around 22GB in a DB repository.
The limit of 1000 files per folder in order to have a good performance is known and will be used. But I don't think KM can handle that much data. Anybody that can prove me wrong?
Thank you
Marius Quadflieg
Edited by: Marius Quadflieg on Apr 21, 2010 4:34 PM

I don't think that storing it will be any problem at all.
What will much more important is what usage patterns will be there. The only way to really find out is to test.

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Performance with dates in the where clause
CREATE TABLE TEST_DATA
FNUMBER NUMBER,
FSTRING VARCHAR2(4000 BYTE),
FDATE DATE
create index t_indx on test_data(fdata);
query 1: select count(*) from TEST_DATA where trunc(fdate) = trunc(sysdate);
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2) From the execution plan, I see that query 2 & 3 is better than query 1. I do not see any difference between execution plan 2 & 3. Which one is better?
3) I read somewhere - "Always check the Access Predicates and Filter Predicates of Explain Plan carefully to determine which columns are contributing to a Range Scan and which columns are merely filtering the returned rows. Be sceptical if the same clause is shown in both."
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Execution Plan 1:
SQL> select count(*) from TEST_DATA where trunc(fdate) = trunc(sysdate);
COUNT(*)
283
Execution Plan
Plan hash value: 1486387033
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
| 0 | SELECT STATEMENT | | 1 | 9 | 517 (20)| 00:00:07 |
| 1 | SORT AGGREGATE | | 1 | 9 | | |
|* 2 | TABLE ACCESS FULL| TEST_DATA | 341 | 3069 | 517 (20)| 00:00:07 |
Predicate Information (identified by operation id):
2 - filter(TRUNC(INTERNAL_FUNCTION("FDATE"))=TRUNC(SYSDATE@!))
Note
- dynamic sampling used for this statement
Statistics
4 recursive calls
0 db block gets
1610 consistent gets
0 physical reads
0 redo size
412 bytes sent via SQL*Net to client
380 bytes received via SQL*Net from client
2 SQL*Net roundtrips to/from client
0 sorts (memory)
0 sorts (disk)
1 rows processed
Execution Plan 2:
SQL> select count(*) from TEST_DATA where fdate between trunc(sysdate) and trunc(SYSDATE) + .99999;
COUNT(*)
283
Execution Plan
Plan hash value: 1687886199
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
| 0 | SELECT STATEMENT | | 1 | 9 | 3 (0)| 00:00:01 |
| 1 | SORT AGGREGATE | | 1 | 9 | | |
|* 2 | FILTER | | | | | |
|* 3 | INDEX RANGE SCAN| T_INDX | 283 | 2547 | 3 (0)| 00:00:01 |
Predicate Information (identified by operation id):
2 - filter(TRUNC(SYSDATE@!)<=TRUNC(SYSDATE@!)+.9999884259259259259259
259259259259259259)
3 - access("FDATE">=TRUNC(SYSDATE@!) AND
"FDATE"<=TRUNC(SYSDATE@!)+.999988425925925925925925925925925925925
9)
Note
- dynamic sampling used for this statement
Statistics
7 recursive calls
0 db block gets
76 consistent gets
0 physical reads
0 redo size
412 bytes sent via SQL*Net to client
380 bytes received via SQL*Net from client
2 SQL*Net roundtrips to/from client
0 sorts (memory)
0 sorts (disk)
1 rows
Execution Plan 3:
SQL> select count(*) from TEST_DATA where fdate between to_date('21-APR-10', 'dd-MON-yy') and to_dat
e('21-APR-10 23:59:59', 'DD-MON-YY hh24:mi:ss');
COUNT(*)
283
Execution Plan
Plan hash value: 1687886199
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
| 0 | SELECT STATEMENT | | 1 | 9 | 3 (0)| 00:00:01 |
| 1 | SORT AGGREGATE | | 1 | 9 | | |
|* 2 | FILTER | | | | | |
|* 3 | INDEX RANGE SCAN| T_INDX | 283 | 2547 | 3 (0)| 00:00:01 |
Predicate Information (identified by operation id):
2 - filter(TO_DATE('21-APR-10','dd-MON-yy')<=TO_DATE('21-APR-10
23:59:59','DD-MON-YY hh24:mi:ss'))
3 - access("FDATE">=TO_DATE('21-APR-10','dd-MON-yy') AND
"FDATE"<=TO_DATE('21-APR-10 23:59:59','DD-MON-YY hh24:mi:ss'))
Note
- dynamic sampling used for this statement
Statistics
7 recursive calls
0 db block gets
76 consistent gets
0 physical reads
0 redo size
412 bytes sent via SQL*Net to client
380 bytes received via SQL*Net from client
2 SQL*Net roundtrips to/from client
0 sorts (memory)
0 sorts (disk)
1 rows processed

Hi,
user10541890 wrote:
Performance with dates in the where clause
CREATE TABLE TEST_DATA
FNUMBER NUMBER,
FSTRING VARCHAR2(4000 BYTE),
FDATE DATE
create index t_indx on test_data(fdata);Did you mean fdat<b>e</b> (ending in e)?
Be careful; post the code you're actually running.
query 1: select count(*) from TEST_DATA where trunc(fdate) = trunc(sysdate);
query 2: select count(*) from TEST_DATA where fdate between trunc(sysdate) and trunc(SYSDATE) + .99999;
query 3: select count(*) from TEST_DATA where fdate between to_date('21-APR-10', 'dd-MON-yy') and to_date('21-APR-10 23:59:59', 'DD-MON-YY hh24:mi:ss');
My questions:
1) Why isn't the index t_indx used in Execution plan 1?To use an index, the indexed column must stand alone as one of the operands. If you had a function-based index on TRUNC (fdate), then it might be used in Query 1, because the left operand of = is TRUNC (fdate).
2) From the execution plan, I see that query 2 & 3 is better than query 1. I do not see any difference between execution plan 2 & 3. Which one is better?That depends on what you mean by "better".
If "better" means faster, you've already shown that one is about as good as the other.
Queries 2 and 3 are doing different things. Assuming the table stays the same, Query 2 may give different results every day, but the results of Query 3 will never change.
For clarity, I prefer:
WHERE fdate >= TRUNC (SYSDATE)
AND fdate < TRUNC (SYSDATE) + 1(or replace SYSDATE with a TO_DATE expression, depending on the requirements).
3) I read somewhere - "Always check the Access Predicates and Filter Predicates of Explain Plan carefully to determine which columns are contributing to a Range Scan and which columns are merely filtering the returned rows. Be sceptical if the same clause is shown in both."
Is that true for Execution plan 2 & 3?
3) Could some one explain what the filter & access predicate mean here?Sorry, I can't.

Can i partition my HD now for fcpx since i didn't do it when i downloaded it. my performance with fcpx is terrible terrible performance

When i downloaded FCPX i was told I really didn't need to partition my hard drive. But my performance with fcpx is terrible from rendering constantly to waiting for a minute after you click for it to do it. I turn off the rendring, I transcoded the media to pro res went to file and hit transcode. but still i mean it crashes, buggy, suggy and it takes hours to do anything. I have my media on a external drive but i did screw up and put some media on internal drive. iMac OSX 10.7.2 3.06 GHZ Core 2 Duo. EX HD LaCie on a 800 firewire.

Partitioning the internal drive is - imho! - completely useless for UNIX-systems such as MacOS, due to excessive usage of (hidden!) temp-files.
And, especially a too small int. HDD partition for the system will brake any app 'til a full halt.
plus, 10.7. has some issues with managing Timemachine backups when it comes to large files as video - again, if the intHDD/OS drive is too small, it gets iffy.
at last >30GBs free, only codecs and material as intended by Cupertino = no probs here (on a much smaller/older set-up).

Slow Performance with Business Rules

Hello,
Has anyone ever had slow performance with business rules? For example, I attached a calc script to a form and it ran for 20 seconds. I made an exact replica of the calc script in a business rules and it took 30 seconds to run. Also, when creating / modifying business rules in EAS it takes a long time to open or save or attach security - any ideas on things to improve this performance?
Thanks!

If you are having issues with performance of assigning access then I am sure there was patch available, it was either a HSS patch or planning patch.
Cheers
John
http://john-goodwin.blogspot.com/

Error while registering user with owb repository.

Hi all,
I am using owb 10gr2.
I am trying to register a user with owb repository. I am getting below error.
ORA-00955: name is already used by an existing object
But when i try to deploy the mapping, it is showing a message
Cannot deploy PL/SQL maps to the target schema because it is not owned by the Control Center.
I am sure the user is not registered with owb repository. But i don't know why it is showing 0RA - 00955 error. Can somebody tell me what is the possible error.
vasu

Hi,
the user was created outside the owb ("... because it is not owned by the Control Center") direct in the database. You must first use the repository assistant (advanced options) to make him to a target user.
Then you can register him in the owb as repository user with special rights.
Regards,
Detlef

JCO3: NullPointerException unregistering server with custom repository

Hello,
I have a JCO 2 project running on a J2EE server that we ported over to JCO3, and the ultimate issue is that when I
stop the JCoServer in the application, it's throwing a null pointer exception. Seemingly because the JCoServers
are in a higher classloader, they are still there on restart, and then I get the NullPointerException trying to
recreate the server as well. I very well may be doing something totally wrong here...
I'm creating the Data Provider, Repository, and Server as follows:
========================================================
// This is a simple implementation of ServerDataProvider
markviewDataProvider = new MarkviewServerDataProvider();
if (!Environment.isServerDataProviderRegistered()){
log.debug("Registering data provider");
Environment.registerServerDataProvider(markviewDataProvider);
else{
log.error("Data provider already registered.");
throw new IllegalStateException("Data provider already registered. Please restart application server.");
// Create the neccessary properties and assign to data provider
// Their values are being read from a database
serverProperties.setProperty(ServerDataProvider.JCO_GWSERV, rfcServerInfo.getGatewayServer());
serverProperties.setProperty(ServerDataProvider.JCO_GWHOST, rfcServerInfo.getGatewayHost());
serverProperties.setProperty(ServerDataProvider.JCO_PROGID, rfcServerInfo.getProgramId());
serverProperties.setProperty(ServerDataProvider.JCO_CONNECTION_COUNT, maxConnections.toString());
//XXX: We have to get this to work or else the server will not restart correctly
//More on this later.
//serverProperties.setProperty(ServerDataProvider.JCO_REP_DEST, "custom destination");
markviewDataProvider.setServerProperties(serverName, serverProperties);
// Get back the configured server from the factory.
JCoServer server;
try
server = JCoServerFactory.getServer(serverName);
catch(JCoException ex)
throw new RuntimeException("Unable to create the server " + serverName
+ ", because of " + ex.getMessage(), ex);
// rfcRepository is a singleton that contains
// repository = JCo.createCustomRepository(name);
// and methods to add structures to the repository
server.setRepository(rfcRepository.exposeRepository());
// add in the handlers, start the server
========================================================
So...the first issue is this: if I set ServerDataProvider.JCO_REP_DEST to anything, the program won't run because
it looks for the repository host connection info in a text file with that name, just like the example code does.
According to the javadoc, custom repositories don't have a destination, so it seems this property should be NULL.
Yet if I leave that property null, it works fine...until I need to stop the server (or, I get the same error when
the above code runs again on restart, as the JCoServerFactory.getServer code runs in both places - tries to refresh
a server that survived the restart as it failed to shut down due to the error).
For completeness, the shutdown code essentially reads:
=========================================================
JCoServer server = JCoServerFactory.getServer(serverName);
server.stop();
=========================================================
Then what happens is this:
java.lang.NullPointerException
        at com.sap.conn.jco.rt.StandaloneServerFactory.compareServerCfg(StandaloneServerFactory.java:91)
        at com.sap.conn.jco.rt.StandaloneServerFactory.getServerInstance(StandaloneServerFactory.java:116)
        at com.sap.conn.jco.server.JCoServerFactory.getServer(JCoServerFactory.java:56)
        at com.markview.integrations.sap.gateway.sap2mv.JCoServerController.destroy(JCoServerController.java:310)
I decompiled and debugged StandaloneServerFactory and I'm seeing this in compareServerCfg:
=========================================================
        key = "jco.server.repository_destination";
        if(!current.getProperty(key).equals(updated.getProperty(key)))
            return CompareResult.CHANGED_RESTART;
        } else
            return CompareResult.CHANGED_UPDATE;
=========================================================
Clearly, if getProperty() returns null, the .equals is going to raise NullPointerException, so this appears to be
the cause of that error. In other words, if this code runs, I'm going to have this problem because the property
needs to (seemingly) be null for my program to run at all.
Any insights on how to fix this / work around this would be greatly appreciated!
Thanks in advance,
Corey

<div style="width:58em;text-align:left">
Whoa, a long posting and I'm not sure I read it thoroughly enough to fully understand your problem - so please be patient with me if any comments are silly...
Your RFC server program provides an implementation for your own ServerDataProvider. If you reference a repository destination the default DestinationDataProvider implemented will look for a file name with the repository and extension .jcoDestination. If you don't like this behavior you simply need to provide your own implementation and register it, same as you did for the server data.
According to the javadoc, custom repositories don't have a destination, so it seems this property should be NULL.
Not sure where you found this. I'm assuming that you're talking about com.sap.conn.jco.JCoCustomRepository, which can of course be backed by a destination, i.e. see the comments in method setDestination:
<div style="text-align:left">Set the destination for the remote queries.
If the requested meta data objects are not available in the repository cache, i.e. not set by the application, the remote query to the specified destination will be started. Default value is null meaning the remote queries are not allowed.
Note: As soon the destination is provided, the repository can contain mixed meta data - set statically by the application and requested dynamically from the ABAP backend.</div>
I usually prefer using a connection to a backend providing the meta data instead of hard coding the meta data insertion into a custom repository. As the data is cached this introduces an acceptable overhead for retrieving meta data for long running server programs.
Anyhow, when you create your custom repository via JCo.createCustomRepository(java.lang.String name) you obviously must give it a name. That's the name I'd expect in the server data as a reference for your repository (property ServerDataProvider.JCO_REP_DEST). However, if your custom repository is not backed by a complete online repository you obviously have to ensure that all meta data is already provided.
So for testing it might be interesting to see if adding a JCoDestination to your custom repository helps. Another option might be to enable tracing and see what goes wrong...
Cheers, harald
</div>

KM Performance with DB Repository of 2TB

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