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Operating Systems AIX ORACLE Database running slow on AIX ( nmon / topas ) Post 302444245 by zaxxon on Wednesday 11th of August 2010 09:31:33 AM
Old 08-11-2010
Not sure what the query is. It can be a complicated or a trivial one. There are several kind of memory types Oracle is using, iiirc, and the biggest is or was the SGA (I am not up to date). Not sure if all those several types that might be configured for that instance can be satisfied with your 4 GB, not to forget that the OS needs some RAM too. Also it is a question on what disks your DB is placed. Slow internal SCSI disks or maybe fast and cached SAN disks.

I remember from DB2 a tool called db2expln with that you could easily check out if a query uses indexes, etc. or does slow table scans etc. I bet there is something similar for Oracle, ie. some kind of SQL analyzer. Maybe it is a missing Index etc...

If you do not mind please let the vmstat -w run while the query is running and post it here using code tags.

What might be also interessting could be following output:
Code:
lsdev -C -l aio0

If there is several problems, it always often a solution to turn on Concurrent I/O (mount option "cio" and in Oracle filesystemio_options=setall) for the data, redo and log filesystems only.
But maybe get the info up there 1st - maybe you find something suspicous.
 

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ODBC_PREPARE(3) 							 1							   ODBC_PREPARE(3)

odbc_prepare - Prepares a statement for execution

SYNOPSIS
resource odbc_prepare (resource $connection_id, string $query_string) DESCRIPTION
Prepares a statement for execution. The result identifier can be used later to execute the statement with odbc_execute(3). Some databases (such as IBM DB2, MS SQL Server, and Oracle) support stored procedures that accept parameters of type IN, INOUT, and OUT as defined by the ODBC specification. However, the Unified ODBC driver currently only supports parameters of type IN to stored procedures. PARAMETERS
o $connection_id -The ODBC connection identifier, see odbc_connect(3) for details. o $query_string - The query string statement being prepared. RETURN VALUES
Returns an ODBC result identifier if the SQL command was prepared successfully. Returns FALSE on error. EXAMPLES
Example #1 odbc_execute(3) and odbc_prepare(3) example In the following code, $success will only be TRUE if all three parameters to myproc are IN parameters: <?php $a = 1; $b = 2; $c = 3; $stmt = odbc_prepare($conn, 'CALL myproc(?,?,?)'); $success = odbc_execute($stmt, array($a, $b, $c)); ?> If you need to call a stored procedure using INOUT or OUT parameters, the recommended workaround is to use a native extension for your database (for example, mssql for MS SQL Server, or oci8 for Oracle). SEE ALSO
odbc_execute(3). PHP Documentation Group ODBC_PREPARE(3)
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