Trace Query fired on Oracle Server

Can any one tell me that how do I find a query that has been fired from some Oracle client.
I want to trace the following,
1. SQL Text.
2. Terminal from where the query was fired.
3. the OS OS UserID

Vaibhav,
Have you tried the following when you are in WebI: go under the Edit Query panel, click on the "SQL" icon, and review the query that is getting generated?  At this point you can also click on the "copy" option, then paste this query into your SQL application analyzer and run to see what results are generated.  To me, it sounds like the portion trying to generate the "minus" sign might be getting tripped up causing the disconnect....
Thanks,
John

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  • ORACLE SERVER AND UNIX TP MONITOR-2

    제품 : ORACLE SERVER
    작성날짜 : 1995-01-24
    Subject: Oracle Server and UNIX Transaction Processing Monitors-2
    Page(3/4)
    This file contains commonly asked questions about Oracle7 Server and UNIX
    Transaction Processing Monitors (TPMs). The topics covered in this article are
         o Oracle Parallel Server and TP Monitors
         o Oracle and DCE-based TP Monitors
         o Other commonly asked questions
    The questions answered in part 3 provide additional detail to the information
    provided in part 1.
    Oracle Parallel Server and TP Monitors
    ======================================
    How does Oracle Parallel Server (OPS) work with TP Monitors?
    If you are using Oracle-managed transactions, there are no special
    considerations. But if you are using TPM-managed transactions, and
    thus need to use the XA interface, then Oracle requires release 7.1.3
    or later and a special version of the Distributed Lock Manager, called
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    available for all platforms. To understand this restriction, let's take
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    move a transaction from one process to another, and even to be
    able to commit in a separate process. In Oracle, transactions are
    attached to sessions, so that means that we also have to be able to
    move sessions. Therefore, the session/transaction can't have any state
    which is tied to a particular process. The first generation distributed
    lock managers were all built to use the process id as the lock owner,
    which doesn't work for locks which need to move with the transaction.
    Oracle and DCE-based TP Monitors
    ================================
    How does Oracle interface to the Encina TP monitor? To CICS/6000? I've
    heard that they require OSF DCE facilities in order to run?
    Oracle interfaces to Encina and CICS/6000 just as it does to any other
    TP Monitor. The TP Monitor issues XA commands to control transactions, and
    Oracle executes the commands. Encina and CICS/6000 do use DCE features for
    their own operation. However, this use is transparent to the Oracle Server.
    What DCE facilities can Oracle products take advantage of when working with
    a DCE-based TP Monitor?
    The two most commonly mentioned DCE features which might be useful
    to Oracle users are multi-threading and security. We look at these in
    the subsequent questions in this section.
    Encina documentation suggests that a Resource Manager such as Oracle can
    be either single-threaded or multi-threaded? Which way is Oracle XA
    implemented?
    The Oracle XA implementation is single-threaded, as is any Oracle client.
    Within a single process, at most one thread can access Oracle at a time.
    Does that mean that only a single Encina application can access an instance
    of Oracle transactionally at any given moment?
    No. Oracle XA is only single-threaded within a single application server
    process. Multiple applications can access Oracle simultaneously using XA
    by using different application processes. Encina allows
    (1) serial reuse of a single server by different clients. There are
    two options for this. The server can use long term reservation
    but be defined to be in shared or concurrent access mode, which
    allows the server to be used by another client as soon as an RPC
    completes. Alternatively, the server can use default reservation
    and exclusive mode, which allows the server to be used by another
    client as soon as the current transaction ends.
    (2) concurrent execution by multiple servers, even if they are accessing
    the same Oracle database. These may be executing the same or different
    procedures.
    These two features should let you get as much concurrency as you need.
    Why isn't the Oracle XA library multi-threaded?
    The XA specification specifically states that its use of the phrase
    "thread of control" means a process. If an RM were to multi-thread its
    XA, it would be in violation of the specification. This restriction
    was put place in because at the time the specification was written,
    there were numerous thread packages: if the TM used one, the application
    another, and perhaps the RM yet a third, there's no way it could work.
    As threads standards settle down, the later versions of XA will probably
    relax this restriction.
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    Very likely. The exact time frame will of course depend on the priority of
    all work items at that time.
    Does Oracle use DCE security via the TP Monitors?
    The integrity of the connection between a DCE TP Monitor client and DCE
    TP Monitor server is protected by the DCE security functionality.
    Theoretically, the TP Monitor could make the DCE-protected client security
    information available to Oracle. Unfortunately, there's no standard way
    for a TP Monitor to pass security information information to a Resource
    Manager such as Oracle. Oracle is leading an effort to extend the X/Open
    model to allow use of the security information provided by the Monitor.
    In the meantime, the basic DCE security features such as encryption are
    useful within TP Monitors.
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    the TP Monitor client be passed through the TP Monitor, through the Oracle
    client (application server), to the Oracle Server, and possibly on
    to other Oracle Servers through database links. The ability to transfer
    security information to other processes, called delegation, is missing
    in DCE version 1.0. DCE version 1.1, expected to emerge in late 1994,
    has some delegation features. Oracle is examining these features to see
    how they might be used.
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    There are two:
    (1) It is inefficient to run without XA. CICS/6000 is designed to
    use XA. It uses XA so that the CICS server can log on to Oracle
    when it starts, after which it makes that Oracle connection available
    to any transaction it executes. If you don't use XA, the CICS server
    does not itself log on to Oracle so each transaction has to log on
    and log off - a very expensive mode of operation. Also, it is very
    un-cics-like in that the application does the log{on,off} and also
    commits - in a mainframe CICS database program CICS would implicitly
    do these operations. Oracle does not recommend this mode because of the
    performance penalty.
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    In order for these modules to access the Oracle connection made by
    CICS, the applications must be built with a shared object version of
    the Oracle libraries. This is an installation option on platforms which
    support CICS/6000 and other products using its architecture such as
    CICS 9000.
    Other commonly asked questions
    ==============================
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    available or in progress. There is an XA C-ISAM product from
    Gresham Telecomputing. There are also Resource Managers contained
    within some of the TP Monitors which can be coordinated in the same
    transaction. For example, CICS/6000 has VSAM files and other data
    stores, Encina has its RQS queuing system, and Tuxedo has its /Q queuing
    system.
    What is Recoverable Queuing Service (RQS) and how does it interoperate with
    Oracle7 and Encina? What about /Q?
    Recoverable Queuing Service is a feature provided by Encina which allows
    transactional, distributed queuing (enqueue/dequeue). Tuxedo has a similar
    product called /Q. Because these products are themselves coordinated by the
    TM component of the TP Monitor, their queue operations are atomically
    coordinated with with operations on XA Resource Managers such as Oracle7
    Server. That is, they can atomically put something on one of their queues
    and commit an Oracle transaction, then at some later time dequeue an
    entry atomically with doing some other Oracle transaction. The queue
    system guarantees that the message will not be lost or transmitted twice.
    Can I mix TP Monitor applications with standard Oracle7 Server applications?
    Yes, you can have existing Oracle applications connected to the database
    with alongside TPM applications against the same database. The TPM does
    not manage the whole database, just those transactions which are started
    by the TPM. The Oracle Server will properly handle concurrency control
    between the transactions managed by itself and those managed by the TPM.
    Is Oracle planning to change its tools to be more suitable for TP Monitors?
    With Oracle Procedure Builder 1.5, to be available with CDE2,
    Oracle will provide a foreign function interface that allows you to
    dynamically set up PL/SQL calls that access C functions. In other
    words, you can access C routines in Windows DLLs from within your
    PL/SQL procedures. This will allow PL/SQL under Windows easy access to
    TP Monitor APIs.
    Does Oracle7 Server itself use XA-compliant TPMs as the interface to
    foreign RMs?
    No, for this purpose Oracle Server uses the SQL*Connect products or the new
    Transparent and Procedural Gateway products.
    Does Oracle7 Server use XA to coordinate Oracle7-only distributed
    transactions?
    No, it uses an internal mechanism.
    Can database links be used with XA?
    If an Oracle7 database is running under XA, it can access other Oracle7
    databases through database links, with some restrictions. First, the
    access to the other database must use SQL*Net V2 and be running MTS.
    Second, it must currently be to another Oracle7 database. Assuming those
    restrictions, the Oracle 7 database can do distributed update to another
    Oracle 7 database by using a database link, whether it is started by an
    Oracle application or a TP Monitor application. The TPM will see Oracle
    as only a single RM, but Oracle7 will propagate all the transaction
    commands to the other database, including the two-phase commit. If
    the transaction is started by a TP Monitor application and is using XA,
    it can also update non-Oracle resources managed by the TPM. If it
    is started from an Oracle application, it can only include resources
    managed by Oracle.
    Here's a sample configuration:
    | TPM | | TPM |
    | client | | client |
    | |
    | |
    | TPM |
    | |
    | |
    | Oracle | Forms, Forms, | Oracle | | non-XA | | XA |
    | client | Plus, Plus, | client | | TPM | | TPM |
    --------- Pro, Pro, --------- | server | | server |
    | Financials, Financials, | |(note 1)| ----------
    | etc. etc. | ---------- |
    | | | |
    | SQL | SQL | SQL | XA
    | commit | commit | commit | commit
    | | | |
    | Oracle | | Oracle | | Oracle | | Oracle |
    | server | | server | | server | | server |
    | | | |
    | | | |
    | | | |
    | Database 1 | | Database 2 |
    | | | |
    | A | A
    | | dblink to database 1 | |
    | ------------------------------------ |
    | |
    dblink to database 2
    Note 1: Oracle will work having both XA and non-XA servers but some TPMs
    may have restrictions on this.
    Are multiple direct connections possible from a Pro* program?
    Using XA, you can not only specify multiple direct connections to Oracle7
    databases, you can also update them both in the SAME transaction. The
    way to do this is to use a precompiler feature called a named database.
    When you use a named database, you qualify the SQL statement with the
    database name. For example, you write EXEC SQL AT dbname UPDATE emp ....
    We have a complementary feature in the xa open string to let the user
    associate the name with a particular RM instance, called the DB clause.
    You will also want to use the SqlNet clause in the open string so you
    can give the two different SIDs. This clause does not require the use of
    the SQL*Net product, it is just a naming convention. For more information,
    see Oracle7 Server for UNIX Administrator's Reference Guide.
    Some TP Monitors may not support having multiple Resource Mangers in the
    same server; check with the TPM vendor.
    Is there any collateral available for XA or TP Monitors?
    Oracle At Work 52684.0692
    Oracle7 Server for UNIX Administrator's #A10324-1
    Reference Guide
    Guide to Oracle's Products and Services #A10560
    Oracle7 Server and CICS/6000               #A14200
    Where can I get more information on the DTP model?
    X/Open's address is
    X/Open company Ltd (Publications)
    P O Box 109
    Penn
    High Wycombe
    Bucks HP10 8NP
    Tel: +44 (0)494 813844
    Fax: +44 (0)494 814989
    Request
    G307 Distributed Transaction Processing: Reference Model Version 2
    X/Open Guide G307 ISBN 1-859120-19-9 28cm.44p.pbk.220g.11/93
    Page(4/4)
    This file contains commonly asked questions about Oracle Server and UNIX
    Transaction Processing Monitors (TPMs). The topics covered in this article are
         o Performance with Oracle Server and TP monitors
         o Performance using Oracle's XA Library
    The questions answered in part 4 provide additional detail to the information
    provided in part 1.
    Performance with Oracle Server and TP Monitors
    ==============================================
    I have heard that Transaction Processing Monitors (TPMs) will increase
    Oracle Server performance. Is this true?
    Several hardware and TPM vendors have made the claim that TPMs
    will increase RDBMS performance. This claim is based on TPC-A
    benchmarks. The key point to understand about TPC-A is that it
    requires, for every transaction-per-second, ten times that many
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    users. The next question will answer in more detail how the the
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    look more generally at what TP Monitors can and can't do to improve
    performance.
    TP Monitors can provide better performance:
    (1) When there are more than several hundred users connected.
         This is because of the TP Monitor's role in the three-tier
         architecture, described in the next question. In this
         architecture, terminal handling is offloaded to one or more
         separate machines, freeing up those cycles to do database work.
         Note that this does NOT mean that Oracle itself runs faster,
         just that we've given it more CPU cycles to use.
    (2) When, because of the high potential concurrency of requests,
         significant resource contention exists. Use of a TP Monitor can
         limit the degree of concurrency and thus reduce contention.
    TP Monitors can not provide better performance:
    (1) For existing applications. The applications must be designed
         to fit the TP Monitor architecture.
    (2) For applications which are highly interactive in their use of
         the database. These applications put many messages
         through the transport system, and the TP Monitor is not as
         efficient as SQL*Net for point-to-point communication.
    (3) For CPU intensive single-query decision support. When executing
         a single large command, Oracle query facilities work efficiently,
         especially with the use of Oracle Parallel Query, available in 7.1.
    How does the three-tier solution help TPC-A, or other situations with
    thousands of on-line users?
    The TPC-A test calls for a large number of users to produce a given
    result. In the high-end results we produced in June, 1992, for example,
    6150 terminals were simulated to produce 618 TPC-A transactions.
    Thus, terminal concentration accounts for a large portion of the total
    processing time used.
    First, let's look at how the Multi Threaded Server would work for
    this benchmark. In this case, there are many client processes,
    but only a few server processes, which handle client requests on a
    first-come first serve basis. When they are done with a request,
    they take another client's request.
    ORACLE7 CLIENT/SERVER ARCHITECTURE WITH MULTI THREADED SERVER
    | Client | | Server |
    | __________ |______________|_____ _____________ _____________ |
    | | Client | | SQL*Net | |_|Dispatcher | | | |
    | | Process| | | ____| Process |___| | |
    | |________| | | | __|___________| | | |
    |____________| | | | | | | | |
    | | | | | | Oracle7 | |
    ______________ | | | __|__|____ | Server | |
    | Client | | | | __|_|_____ | | | |
    | __________ | | | | | Shared | |____| | |
    | | Client | | SQL*Net | | | | Server |_|____| | |
    | | Process|_|______________|__| | | Process|_| | | |
    | |________| | | | |________| |___________| |
    |____________| | | |
    | | |
    ______________ | | |
    | Client | | | |
    | __________ | | | |
    | | Client | | SQL*Net | | |
    | | Process|_|______________|____| |
    | |________| | | |
    |____________| | |
    |_______________________________________|
    Client processes = N Dispatcher processes >= 1
    Shared server processes >= 1
    If there are 500 clients in this environment, there will be one or more
    dispatcher processes, dynamically tunable, and one or more shared
    server processes, dynamically tunable, on the server. The reduction
    in the total number of processes handled by the server system
    results in more processing time available for RDBMS activity. Thus
    higher RDBMS transaction throughput can be obtained on the
    server system.
    But the problem for the TPC-A, and for certain large customer
    configurations, is not the only ability of the Oracle Server to
    process transactions, but also the ability of the operating
    system to handle huge numbers of incoming connections.
    There is one incoming connection for each client. Most UNIX
    operating systems have a limit on how many such connections they can
    handle. Even if a particular operating system allows a large number of
    connections, each takes some amount of overhead to manage.
    In order to service all 6150 terminals, we selected a 3-tier hardware
    environment where the middle tier, using a TPM, acted as a terminal
    concentrator. The high-end TPC-A architecture looked like the following.
    The Application Servers, which contain the Pro*C statements used to
    perform the transaction also run on the terminal concentrator machine
    in order to offload as much work from the database serve as possible.
    They send the compiled SQL over SQL*Net to the Oracle7 Server processes.
    ORACLE7 TPS-A CLIENT/SERVER ARCHITECTURE
    | Client | | Terminal | | Server |
    | ________ | | Concentrator | | |
    | | Client | |TPM | | | |
    | | Process|_|_____|__ _____ | | |
    | |________| |Comm | | | | | | |
    |____________| | | | | | | |
    | |__| | | | |
    ____________ | | TPM | | | |
    | Client | | ___| | _______ | | ________ _______ |
    | ________ | | | | |_| |__|_______|__| Oracle | | | |
    | | Client | |TPM | | | | |Appl. | |SQL*Net| | Server |__| | |
    | | Process|_|_____|_| |_____| |Server | | | | Process| | | |
    | |________| |Comm | |_______| | | |________| | | |
    |____________| | | | | | |
    |_______________________| | | | |
    | | | |
    ____________ _______________________ | |Oracle7| |
    | Client | | Terminal | | |Server | |
    | ________ | | Concentrator | | | | |
    | | Client | |TPM | | | | | |
    | | Process|_|_____|__ _____ | | __________ | | |
    | |________| |Comm | | | | _______ |SQL*Net| | Oracle | | | |
    |____________| | | | |_| |__|_______|__| Server |__| | |
    | |__| | |Appl. | | | | Process| | | |
    ____________ | | TPM | |Server | | | |________| |_______| |
    | Client | | ___| | |_______| | | |
    | ________ | | | | | | | |
    | | Client | |TPM | | | | | | |
    | | Process|_|_____|_| |_____| | | |
    | |________| |Comm | | | |
    |____________| | | | |
    |_______________________| |________________________|
    Clients = 6150 Terminal concentrators = 17
    TP Monitor instances = 17
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    = 17*8 = 17*8
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    Can you summarize the performance discussion for me?
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    Performance using Oracle's XA Library
    =====================================
    Are there any performance implications to using the XA library (in other
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    longer because we need to map back and forth between external
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    improved for 7.1.
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    for that when sizing the application.
    (3) Although some TPMs allow parallel execution of services (such as Tuxedo's
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