Improve performance by less server calls
Hi,
I have a problem with an application that are to slow. One of the
problems is that the client calls the server alot of times. What I would
like to do (what I should have done from the start) is minimize the calls
to the server. But the calls are scattered around the client code so I
can�t see an easy way of doing this.
(Every server call go through a class called ServerInteractor.)
I think this might be a very common newbie mistake, so I hope there is
someone out there who knows a way to solve this.
Thanks!
Thanks for your replies!
My experience is that if your app is taking too longto load, it's likely the amount of data you are
retrieving, not the number of times you call the
server
Do you think this might vary if you have a slow or
fast network-connection?We had this problem on a local network. A slow network would just be worse. Actually, we had to support slow connections (56K) so we ended up compressing the messages.
Most likely caching the screen after the first timeyou get the information about it and reusing that
cached version will yield better performance
I have implemented a client cache that caches
information about the
windows. This was the solution we came up with for the 'big spit-ball' message pattern. We cached as much information as possible. On shutdown of the app, we serialized the cache to disk. We implemented a small message that would report when parts of the cache items were no longer valid. By making the cache block the client, we were able to do this seamlessly.
This improves performence alot! The second
time you open
a window it takes 4 seconds instead of 25.
But now I am facing another problem. After runing the
app for a while I
get an outOfMemoryError. Before the client cache I
never got this error,
but now it always comes after I run the app for a
while. So this makes
me think that the cache "is to be blamed". Is this a
sign for a bug in my
caching code? I have read that you can increase the
memory when you
start the app, but is that a guarantee for this never
to happen?From your description, it sounds like increasing the max heap size will merely delay the error.
You've got two options at this point: 1. Start looking through the code for the cache and make sure you are not holding onto expired information. 2. Get a profiling tool and use it to figure out where the leak is.
I would attempt 1. since you just wrote the cache but I find that guis are the worst for sneaky leaks. Watch out for inner classes (not static nested classes) because they contain a hidden reference to the outer instance.
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How to solve bad performance in vi server
I'm useing vi server in a recursively programming structure in labview 7.1.
I have very bad performance result so i made a test comparing the speed of che various vi server call and the native.
my tests are:
normal calling.
vi server calling by reference node
vi server calling by invoke node
for each vi server calling type i tried:
unique reference calling
different reference calling
different reference, preloaded, calling
the only 1 case i found a loosing of performace acceptable 24% respect the normal calling: vi server calling by reference node with unique reference.
unfortunately this kind of calling is able to catch come kind of recunsion an forbidden it and this calling wait all the time the end of the execution of the vi called.
All the oter kinds of caling have very bad performance: from 90% to 99,9% LESS then the normal calling (10 to 1000 times more in execution time).
In addition there is a prblem in invoke colling: if you execute a invoke node with wait until done true, the mouse pointer fliks with the busy icone. that heppens in all the possible configuration.
I would like ti know if someuone as some solution to this performance problem and if Labview 8.0 fixs this problems.
Best regarda.
ing. Luca BenvegnùHi Luca,
I've made some researches for you and, what can I say is that there is a certain number of requests about "vi server performances". There are some things that are in general suggested in this situation:
1) Be "minimalist" about the use of images, graph,... And avoid Large data structures: wiring large structures into/out-of sub-VI's can take time: pass the smallest amount of data.
2) Avoid repeated calls. Calling the sub-VI's frequently, in a loop for example, create a call over-head that could be an issue. For the same reason put the "wait until" function with a specification of time in order to run loops only as often as strictly required.
However, about your question of fixing the problem with LabVIEW 8.0, I suggest you to download the Evaluation Version of LabVIEW 8.2 and try by yourself if performances are better.
I hope I've been of some help.
carlo> -
How to run query in parallel to improve performance
I am using ALDSP2.5, My data tables are split to 12 ways, based on hash of a particular column name. I have a query to get a piece of data I am looking for. However, this data is split across the 12 tables. So, even though my query is the same, I need to run it on 12 tables instead of 1. I want to run all 12 queries in parallel instead of one by one, collapse the datasets returned and return it back to the caller. How can I do this in ALDSP ?
To be specific, I will call below operation to get data:
declare function ds:SOA_1MIN_POOL_METRIC() as element(tgt:SOA_1MIN_POOL_METRIC_00)*
src0:SOA_1MIN_POOL_METRIC(),
src1:SOA_1MIN_POOL_METRIC(),
src2:SOA_1MIN_POOL_METRIC(),
src3:SOA_1MIN_POOL_METRIC(),
src4:SOA_1MIN_POOL_METRIC(),
src5:SOA_1MIN_POOL_METRIC(),
src6:SOA_1MIN_POOL_METRIC(),
src7:SOA_1MIN_POOL_METRIC(),
src8:SOA_1MIN_POOL_METRIC(),
src9:SOA_1MIN_POOL_METRIC(),
src10:SOA_1MIN_POOL_METRIC(),
src11:SOA_1MIN_POOL_METRIC()
This method acts as a proxy, it aggregates data from 12 data tables
src0:SOA_1MIN_POOL_METRIC() get data from SOA_1MIN_POOL_METRIC_00 table
src1:SOA_1MIN_POOL_METRIC() get data from SOA_1MIN_POOL_METRIC_01 table and so on.
The data source of each table is different (src0, src1 etc), how can I run these queries in parallel to improve performance?Thanks Mike.
The async function works, from the log, I could see the queries are executed in parallel.
but the behavior is confused, with same input, sometimes it gives me right result, some times(especially when there are few other applications running in the machine) it throws below exception:
java.lang.IllegalStateException
at weblogic.xml.query.iterators.BasicMaterializedTokenStream.deRegister(BasicMaterializedTokenStream.java:256)
at weblogic.xml.query.iterators.BasicMaterializedTokenStream$MatStreamIterator.close(BasicMaterializedTokenStream.java:436)
at weblogic.xml.query.runtime.core.RTVariable.close(RTVariable.java:54)
at weblogic.xml.query.runtime.core.RTVariableSync.close(RTVariableSync.java:74)
at weblogic.xml.query.iterators.FirstOrderIterator.close(FirstOrderIterator.java:173)
at weblogic.xml.query.iterators.FirstOrderIterator.close(FirstOrderIterator.java:173)
at weblogic.xml.query.iterators.FirstOrderIterator.close(FirstOrderIterator.java:173)
at weblogic.xml.query.iterators.FirstOrderIterator.close(FirstOrderIterator.java:173)
at weblogic.xml.query.runtime.core.IfThenElse.close(IfThenElse.java:99)
at weblogic.xml.query.runtime.core.CountMapIterator.close(CountMapIterator.java:222)
at weblogic.xml.query.runtime.core.LetIterator.close(LetIterator.java:140)
at weblogic.xml.query.runtime.constructor.SuperElementConstructor.prepClose(SuperElementConstructor.java:183)
at weblogic.xml.query.runtime.constructor.PartMatElemConstructor.close(PartMatElemConstructor.java:251)
at weblogic.xml.query.runtime.querycide.QueryAssassin.close(QueryAssassin.java:65)
at weblogic.xml.query.iterators.FirstOrderIterator.close(FirstOrderIterator.java:173)
at weblogic.xml.query.runtime.core.QueryIterator.close(QueryIterator.java:146)
at com.bea.ld.server.QueryInvocation.getResult(QueryInvocation.java:462)
at com.bea.ld.EJBRequestHandler.executeFunction(EJBRequestHandler.java:346)
at com.bea.ld.ServerBean.executeFunction(ServerBean.java:108)
at com.bea.ld.Server_ydm4ie_EOImpl.executeFunction(Server_ydm4ie_EOImpl.java:262)
at com.bea.dsp.dsmediator.client.XmlDataServiceBase.invokeFunction(XmlDataServiceBase.java:312)
at com.bea.dsp.dsmediator.client.XmlDataServiceBase.invoke(XmlDataServiceBase.java:231)
at com.ebay.rds.dao.SOAMetricDAO.getMetricAggNumber(SOAMetricDAO.java:502)
at com.ebay.rds.impl.NexusImpl.getMetricAggNumber(NexusImpl.java:199)
at com.ebay.rds.impl.NexusImpl.getMetricAggNumber(NexusImpl.java:174)
at RDSWS.getMetricAggNumber(RDSWS.jws:240)
at jrockit.reflect.VirtualNativeMethodInvoker.invoke(Ljava.lang.Object;[Ljava.lang.Object;)Ljava.lang.Object;(Unknown Source)
at java.lang.reflect.Method.invoke(Ljava.lang.Object;[Ljava.lang.Object;I)Ljava.lang.Object;(Unknown Source)
at com.bea.wlw.runtime.core.dispatcher.DispMethod.invoke(DispMethod.java:371)
below is my code example, first I get data from all the 12 queries, each query is enclosed with fn-bea:async function, finally, I do a group by aggregation based on the whole data set, is it possible that the exception is due to some threads are not returned data yet, but the aggregation has started?
the metircName, serviceName, opname, and $soaDbRequest are simply passed from operation parameters.
let $METRIC_RESULT :=
fn-bea:async(
for $SOA_METRIC in ns20:getMetrics($metricName,$serviceName,$opName,"")
for $SOA_POOL_METRIC in src0:SOA_1MIN_POOL_METRIC()
where
$SOA_POOL_METRIC/SOA_METRIC_ID eq fn-bea:fence($SOA_METRIC/SOA_METRIC_ID)
and $SOA_POOL_METRIC/CAL_CUBE_ID ge fn-bea:fence($soaDbRequest/ns16:StartTime)
and $SOA_POOL_METRIC/CAL_CUBE_ID lt fn-bea:fence($soaDbRequest/ns16:EndTime )
and ( $SOA_POOL_METRIC/SOA_SERVICE_ID eq fn-bea:fence($soaDbRequest/ns16:ServiceID)
or (0 eq fn-bea:fence($soaDbRequest/ns16:ServiceID)))
and ( $SOA_POOL_METRIC/POOL_ID eq fn-bea:fence($soaDbRequest/ns16:PoolID)
or (0 eq fn-bea:fence($soaDbRequest/ns16:PoolID)))
and ( $SOA_POOL_METRIC/SOA_USE_CASE_ID eq fn-bea:fence($soaDbRequest/ns16:UseCaseID)
or (0 eq fn-bea:fence($soaDbRequest/ns16:UseCaseID)))
and ( $SOA_POOL_METRIC/ROLE_TYPE eq fn-bea:fence($soaDbRequest/ns16:RoleID)
or (-1 eq fn-bea:fence($soaDbRequest/ns16:RoleID)))
return
$SOA_POOL_METRIC
fn-bea:async(for $SOA_METRIC in ns20:getMetrics($metricName,$serviceName,$opName,"")
for $SOA_POOL_METRIC in src1:SOA_1MIN_POOL_METRIC()
where
$SOA_POOL_METRIC/SOA_METRIC_ID eq fn-bea:fence($SOA_METRIC/SOA_METRIC_ID)
and $SOA_POOL_METRIC/CAL_CUBE_ID ge fn-bea:fence($soaDbRequest/ns16:StartTime)
and $SOA_POOL_METRIC/CAL_CUBE_ID lt fn-bea:fence($soaDbRequest/ns16:EndTime )
and ( $SOA_POOL_METRIC/SOA_SERVICE_ID eq fn-bea:fence($soaDbRequest/ns16:ServiceID)
or (0 eq fn-bea:fence($soaDbRequest/ns16:ServiceID)))
and ( $SOA_POOL_METRIC/POOL_ID eq fn-bea:fence($soaDbRequest/ns16:PoolID)
or (0 eq fn-bea:fence($soaDbRequest/ns16:PoolID)))
and ( $SOA_POOL_METRIC/SOA_USE_CASE_ID eq fn-bea:fence($soaDbRequest/ns16:UseCaseID)
or (0 eq fn-bea:fence($soaDbRequest/ns16:UseCaseID)))
and ( $SOA_POOL_METRIC/ROLE_TYPE eq fn-bea:fence($soaDbRequest/ns16:RoleID)
or (-1 eq fn-bea:fence($soaDbRequest/ns16:RoleID)))
return
$SOA_POOL_METRIC
... //12 similar queries
for $Metric_data in $METRIC_RESULT
group $Metric_data as $Metric_data_Group
by $Metric_data/ROLE_TYPE as $role_type_id
return
<ns0:RawMetric>
<ns0:endTime?></ns0:endTime>
<ns0:target?>{$role_type_id}</ns0:target>
<ns0:value0>{fn:sum($Metric_data_Group/METRIC_COMPONENT_VALUE0)}</ns0:value0>
<ns0:value1>{fn:sum($Metric_data_Group/METRIC_COMPONENT_VALUE1)}</ns0:value1>
<ns0:value2>{fn:sum($Metric_data_Group/METRIC_COMPONENT_VALUE2)}</ns0:value2>
<ns0:value3>{fn:sum($Metric_data_Group/METRIC_COMPONENT_VALUE3)}</ns0:value3>
</ns0:RawMetric>
could you tell me why the result is unstable? thanks! -
FI-CA events to improve performance
Hello experts,
Does anybody use the FI-CA events to improve the extraction performance for datasources 0FC_OP_01 and 0FC_CI_01 (open and cleared items)?
It seems that this specific exits associated to BW events have been developped especially to improve performance.
Any documentation, guide should be appreciate.
Thanks.
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@Sybrand
Please answer first whether the column is stored in a separate lobsegment.
No. Table,Index,LOB,LOB index uses the same TS. I missed adding this point( moving to separate TS) as part of table modifications.
@Hemant
There's a famous paper / blog post about CLOBs and Database Flashback. If I find it, I'll post the URL.
Is this the one you are referring to
http://laimisnd.wordpress.com/2011/03/25/lobs-and-flashback-database-performance/
By moving the CLOB column to different block size , I will test the performance improvement it gives and will share the results.
We dont need any data from this table. XML file contains details about finger prints and once the application server completes the job , XML data is deleted from this table.
So no need of backup/recovery operations for this table. Client will be able to replay the transactions if any problem occurs.
@Billy
We are not performing XML parsing on DB side. Gets the XML data from client -> insert into table -> client selects from table -> Upon successful completion of the Job from client ,XML data gets deleted.
Regarding binding of LOB from client side, will check on that side also to reduce round trips.
By changing the blocksize, I can keep db_32K_cache_size=2G and keep this table in CACHE. If I directly put my table to CACHE, it will age out all other operation from buffer which makes things worse for us.
This insert is part of transaction( Registration of a finger print) and this is the only statement taking time as of now compared to other statements in the transaction.
Thanks,
Arun -
How to preload sound into memory to improve performance?
Hello all
I have an application where it needs to play 4 different short wave files on some events. The wave files are small (less then 1 sec each) so they can be preloaded into memory. But I don't really know how to do that.. This is my current code... Performance is really important here, so the faster users can hear the sounds, the better...
import java.io.*;
import javax.sound.sampled.*;
import javax.swing.*;
import java.awt.event.*;
public class PlaySound implements ActionListener
private Clip clip = null;
public void play(String name)
if (clip != null)
clip.stop();
clip = null;
loadClip(name);
clip.start();
private void loadClip(String fnm)
try
AudioInputStream stream = AudioSystem.getAudioInputStream(new File(fnm + ".wav"));
AudioFormat format = stream.getFormat();
DataLine.Info info = new DataLine.Info(Clip.class, format);
if (!AudioSystem.isLineSupported(info))
JOptionPane.showMessageDialog(null, "Unsupported sound line", "Warning!", JOptionPane.WARNING_MESSAGE);
else
clip = (Clip) AudioSystem.getLine(info);
clip.open(stream);
stream.close();
catch (Exception e)
JOptionPane.showMessageDialog(null, "loadClip E: " + e.toString(), "Warning!", JOptionPane.WARNING_MESSAGE);
public static void main(String[] args)
play("a wav file name");
} I would appreciate it if someone can point out how I can preload them to improve performance... Thanks in advance!The message above should be:
OMG, me dumb you smart Florian...
Thank you for your suggestion... It's not the best OR anything close to what I thought it would be, it's certainly one way to do it and better then what I've got now...
Thanks again Florian, I really appreciate it!!
BTW, is there anything that would produce the sound faster then this?
Message was edited by:
BuggyVB -
How to improve Performance of the Statements.
Hi,
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Everyone who advise you to change some parameters to some value without any more info shouldn't be listen.
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Hi,
I am working on a distributed application with Azure Storage Queue for message queuing. queue will be used by multiple clients across the clock and thus it is expected that it would be heavily loaded most on the time in usage. business case is typical as in
it pulls message from queue, process the message then deletes the message from queue. this module also sends back a notification to user indicating process is complete. functions/modules work fine as in they meet the logical requirement. pretty typical queue
scenario.
Now, coming to the problem statement. since it is envisaged that the queue would be heavily loaded most of the time, I am pushing towards to speed up processing of the overall message lifetime. the faster I can clear messages, the better overall experience
it would be for everyone, system and users.
To improve on performance I did multiple cycles for performance profiling and then improving on the identified "HOT" path/function.
It all came down to a point where only the Azure Queue pull and delete are the only two most time consuming calls outside. I can further improve on pull, which i did by batch pulling 32 message at a time (which is the max message count i can pull from Azure
queue at once at the time of writing this question.), this returned me a favor as in by reducing processing time to a big margin. all good till this as well.
i am processing these messages in parallel so as to improve on overall performance.
pseudo code:
//AzureQueue Class is encapsulating calls to Azure Storage Queue.
//assume nothing fancy inside, vanila calls to queue for pull/push/delete
var batchMessages = AzureQueue.Pull(32); Parallel.ForEach(batchMessages, bMessage =>
//DoSomething does some background processing;
try{DoSomething(bMessage);}
catch()
//Log exception
AzureQueue.Delete(bMessage);
With this change now, profiling results show that up-to 90% of time is only taken by the Azure Message delete calls. As it is good to delete message as soon as processing is done, i remove it just after "DoSomething" is finished.
what i need now is suggestions on how to further improve performance of this function when 90% of the time is being eaten up by the Azure Queue Delete call itself? is there a better faster way to perform delete/bulk delete etc?
with the implementation mentioned here, i get speed of close to 25 messages/sec. Right now Azure queue delete calls are choking application performance. so is there any hope to push it further.
Does it also makes difference in performance which queue delete call am making? as of now queue has overloaded method for deleting message, one which except message object and another which accepts message identifier and pop receipt. i am using the later
one here with message identifier nad pop receipt to delete message from queue.
Let me know if you need any additional information or any clarification in question.
Inputs/suggestions are welcome.
Many thanks.The first thing that came to mind was to use a parallel delete at the same time you run the work in DoSomething. If DoSomething fails, add the message back into the queue. This won't work for every application, and work that was in the queue
near the head could be pushed back to the tail, so you'd have to think about how that may effect your workload.
Or, make a threadpool queued delete after the work was successful. Fire and forget. However, if you're loading the processing at 25/sec, and 90% of time sits on the delete, you'd quickly accumulate delete calls for the threadpool until you'd
never catch up. At 70-80% duty cycle this may work, but the closer you get to always being busy could make this dangerous.
I wonder if calling the delete REST API yourself may offer any improvements. If you find the delete sets up a TCP connection each time, this may be all you need. Try to keep the connection open, or see if the REST API can delete more at a time
than the SDK API can.
Or, if you have the funds, just have more VM instances doing the work in parallel, so the first machine handles 25/sec, the second at 25/sec also - and you just live with the slow delete. If that's still not good enough, add more instances.
Darin R. -
Improving performance of scripts in a PDF form
Hello there. I'm a bit new to the scripting in Acrobat and find myself with a complex form that has a number of instances (about 70) of the following script (specific to individual fields):
event.value=this.getField("Ranks").value + this.getField("Mod").value + this.getField("MiscMod").value;
var trained = "Untrained";
var skill = "Ranks";
if ( (this.getField(trained).value != "On" ) && (this.getField(skill).value < 1)) {
event.target.textColor = ["G", 1]; }
else {event.target.textColor = ["G", 0];}
The code works fine, but with this many instances, performance of form is sluggish while updating. In addition, there are approximately 200 simple addtion fields being used.
I'm looking for any advice, scripting or otherwise, to help improve performance.
Thanks so much in advance.If you create a function in the document scripts :
function updateField() {
event.value=this.getField("Ranks").value + this.getField("Mod").value + this.getField("MiscMod").value;
var trained = "Untrained";
var skill = "Ranks";
if ( (this.getField(trained).value != "On" ) && (this.getField(skill).value < 1)) {
event.target.textColor = ["G", 1]; }
else {event.target.textColor = ["G", 0];}
you could replace the code in each field with the following function call, and they would all use the same code:
updateField()
Without knowing exactly what 'slightly different code'' entails, you can add parameters to the function call:
function updateField(Rank, Mod, MiscMod) {
event.value= Rank + Mod + MiscMod;
var trained = "Untrained";
var skill = "Ranks";
if ( (this.getField(trained).value != "On" ) && (this.getField(skill).value < 1)) {
event.target.textColor = ["G", 1]; }
else {event.target.textColor = ["G", 0];}
and you could call it in each field with different values for 'Rank', 'Mod', and 'MiscMod' (or whatever parameters you use) like this:
updateField(getField("Ranks").value, this.getField("Mod").value, this.getField("MiscMod").value )
or
updateField(getField("aDifferentRanks").value, this.getField("aDifferentMod").value, this.getField("aDifferentMiscMod").value )
or
updateField(47, 12, 45)
If you need to make changes, you only need to change the 'updateField' function once, and any field which calls it will use the updated code. -
Upgraded both computers in the household and found Lion is too disruptive to workflow.
Do I turn in the new laptop for a pre-Lion rebuild to keep Snow Leopard, or do I return new computer and get upgraded memory to improve performance of existing MacBookPro? I'm mostly still happy with existing MacBookPro, but Aperture doesn't work, the computer can't handle it.
Other possibility is setting up virtual machine with Snow Leopard server software on new computer.
Any opinions on what would allow moving forward with the least hassle and best workflow continuity?hi,
what year and specs does the MBP have -
Times ten to improve performance for search results in Oracle eBS
Hi ,
We have various search scenarios in our ERP implementaion using Oracle Apps eBS, for example searching for an item . Oracle apps does provide item search but performance is not great. We have about 30 million items and hence to improve the performance of the search thought Times ten may help.
Can anyone please clarify if Times ten can be used to improve performance on the eBS database , if yes how.Vikash,
We were thinking along the same lines (using TimesTen for massive item search in e-Business Suite). In our case massive Item / parametric search leveraging the Product Information Management application. We were thinking about setting up a POC on a Linux Server with a Vision Instance. We should compare notes?
SParker -
Improving performance of zreport
Hi,
I have on requirement of improving performance of zreport.
(1) Apart from nested loops, select within loop, inner joins, is there any other changes i have to consider.
(2) There 4 nested loops found, which have upto 1 level. Is it mandatory for avoiding nested loops which have upto 1 level?
(3) How to avoid SELECT, ENDSELECT within LOOP and ENDLOOP
(4) The FM WS_DOWNLOAD, which is outdated is called for downloading data into excel. Which one i have to choose for replacing this FM.
I will reward, if it is useful.Hi,
Downloading Internal Tables to Excel
Often we face situations where we need to download internal table contents onto an Excel sheet. We are familiar with the function module WS_DOWNLOAD. Though this function module downloads the contents onto the Excel sheet, there cannot be any column headings or we cannot differentiate the primary keys just by seeing the Excel sheet.
For this purpose, we can use the function module XXL_FULL_API. The Excel sheet which is generated by this function module contains the column headings and the key columns are highlighted with a different color. Other options that are available with this function module are we can swap two columns or supress a field from displaying on the Excel sheet. The simple code for the usage of this function module is given below.
Program code :
REPORT Excel.
TABLES:
sflight.
header data................................
DATA :
header1 LIKE gxxlt_p-text VALUE 'Suresh',
header2 LIKE gxxlt_p-text VALUE 'Excel sheet'.
Internal table for holding the SFLIGHT data
DATA BEGIN OF t_sflight OCCURS 0.
INCLUDE STRUCTURE sflight.
DATA END OF t_sflight.
Internal table for holding the horizontal key.
DATA BEGIN OF t_hkey OCCURS 0.
INCLUDE STRUCTURE gxxlt_h.
DATA END OF t_hkey .
Internal table for holding the vertical key.
DATA BEGIN OF t_vkey OCCURS 0.
INCLUDE STRUCTURE gxxlt_v.
DATA END OF t_vkey .
Internal table for holding the online text....
DATA BEGIN OF t_online OCCURS 0.
INCLUDE STRUCTURE gxxlt_o.
DATA END OF t_online.
Internal table to hold print text.............
DATA BEGIN OF t_print OCCURS 0.
INCLUDE STRUCTURE gxxlt_p.
DATA END OF t_print.
Internal table to hold SEMA data..............
DATA BEGIN OF t_sema OCCURS 0.
INCLUDE STRUCTURE gxxlt_s.
DATA END OF t_sema.
Retreiving data from sflight.
SELECT * FROM sflight
INTO TABLE t_sflight.
Text which will be displayed online is declared here....
t_online-line_no = '1'.
t_online-info_name = 'Created by'.
t_online-info_value = 'KODANDARAMI REDDY.S'.
APPEND t_online.
Text which will be printed out..........................
t_print-hf = 'H'.
t_print-lcr = 'L'.
t_print-line_no = '1'.
t_print-text = 'This is the header'.
APPEND t_print.
t_print-hf = 'F'.
t_print-lcr = 'C'.
t_print-line_no = '1'.
t_print-text = 'This is the footer'.
APPEND t_print.
Defining the vertical key columns.......
t_vkey-col_no = '1'.
t_vkey-col_name = 'MANDT'.
APPEND t_vkey.
t_vkey-col_no = '2'.
t_vkey-col_name = 'CARRID'.
APPEND t_vkey.
t_vkey-col_no = '3'.
t_vkey-col_name = 'CONNID'.
APPEND t_vkey.
t_vkey-col_no = '4'.
t_vkey-col_name = 'FLDATE'.
APPEND t_vkey.
Header text for the data columns................
t_hkey-row_no = '1'.
t_hkey-col_no = 1.
t_hkey-col_name = 'PRICE'.
APPEND t_hkey.
t_hkey-col_no = 2.
t_hkey-col_name = 'CURRENCY'.
APPEND t_hkey.
t_hkey-col_no = 3.
t_hkey-col_name = 'PLANETYPE'.
APPEND t_hkey.
t_hkey-col_no = 4.
t_hkey-col_name = 'SEATSMAX'.
APPEND t_hkey.
t_hkey-col_no = 5.
t_hkey-col_name = 'SEATSOCC'.
APPEND t_hkey.
t_hkey-col_no = 6.
t_hkey-col_name = 'PAYMENTSUM'.
APPEND t_hkey.
populating the SEMA data..........................
t_sema-col_no = 1.
t_sema-col_typ = 'STR'.
t_sema-col_ops = 'DFT'.
APPEND t_sema.
t_sema-col_no = 2.
APPEND t_sema.
t_sema-col_no = 3.
APPEND t_sema.
t_sema-col_no = 4.
APPEND t_sema.
t_sema-col_no = 5.
APPEND t_sema.
t_sema-col_no = 6.
APPEND t_sema.
t_sema-col_no = 7.
APPEND t_sema.
t_sema-col_no = 8.
APPEND t_sema.
t_sema-col_no = 9.
APPEND t_sema.
t_sema-col_no = 10.
t_sema-col_typ = 'NUM'.
t_sema-col_ops = 'ADD'.
APPEND t_sema.
CALL FUNCTION 'XXL_FULL_API'
EXPORTING
DATA_ENDING_AT = 54
DATA_STARTING_AT = 5
filename = 'TESTFILE'
header_1 = header1
header_2 = header2
no_dialog = 'X'
no_start = ' '
n_att_cols = 6
n_hrz_keys = 1
n_vrt_keys = 4
sema_type = 'X'
SO_TITLE = ' '
TABLES
data = t_sflight
hkey = t_hkey
online_text = t_online
print_text = t_print
sema = t_sema
vkey = t_vkey
EXCEPTIONS
cancelled_by_user = 1
data_too_big = 2
dim_mismatch_data = 3
dim_mismatch_sema = 4
dim_mismatch_vkey = 5
error_in_hkey = 6
error_in_sema = 7
file_open_error = 8
file_write_error = 9
inv_data_range = 10
inv_winsys = 11
inv_xxl = 12
OTHERS = 13
IF sy-subrc <> 0.
MESSAGE ID sy-msgid TYPE sy-msgty NUMBER sy-msgno
WITH sy-msgv1 sy-msgv2 sy-msgv3 sy-msgv4.
ENDIF.
reward if helpful
raam -
Improving performance of query with View
Hi ,
I'm working on a stored procedure where certain records have to be eleminated , unfortunately tables involved in this exception query are present in a different database which will lead to performance issue. Is there any way in SQL Server to store this query
in a view and store it's execution plan and make it work like sp.While I beleive it's kinda crazy thought but is there any better way to improve performance of query when accessed across databases.
Thanks,
Vishal.Do not try to solve problems that you have not yet confirmed to exist. There is no general reason why a query (regardless of whether it involves a view) that refers to a table in a different database (NB - DATABASE not INSTANCE) will perform poorly.
As a suggestion, write a working query using a duplicate of the table in the current database. Once it is working, then worry about performance. Once that is working as efficiently as it can , change the query to use the "remote" table rather
than the duplicate. Then determine if you have an issue. If you cannot get the level of performance you desire with a local table, then you most likely have a much larger issue to address. In that case, perhaps you need to change your perspective
and approach to accomplishing your goal.
Maybe you are looking for
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