Poor gigabit performance, how do I improve it?

Hello,
I have a 1st generation 2x2Ghz power mac g5, and I'm trying to build a gigabit network with some PCs and a brand new MacBookPro (what a laptop!). Although the gigabit network is up and running (and either the laptop or the g5's ifconfigs say something like "media: autoselect (1000baseT <full-duplex>) status: active"), I can only get speeds around 30 MB/s. That is 30*8=240Mbit/s, far from the 1000 Mbit/s = 125 MB/s I should theoretically get with a gigabit network (yes, I know that 125 MB/s are impossible to get, but at least I'd like to have 80/100 MB/s). What am I doing wrong?

My suggestion would be to replace the 5e cables to 6.
If they're indeed so short it wouldn't cost you a lot.
If 5e cables are homologated for gigabit network they should work.
I run a Linksys Dual Layer and a Cisco Catalyst
3-layer switch in my LAN. Both switches are
highly-capable of delivering gigabit...
You've got enterprise-class hardware. I can't afford such expensive equipment...
And to define an "expensive" switch hard - money
means different things to different people. I'd
always suggest to buy brands that are "known to work"
in larger scale. Netgear is, sorry to say, not really
one of them. A lot of people in these forums seems to
have problems with netgear hardware - for whatever
reason.
I like netgear, and I've always bought netgear network hardware after trying linksys (worst vendor ever, they claim they're cisco and instead sell crappy hardware, had a few routers from them, all screwed up after 6 months of use) and d-link (bought a claimed-to-be ADSL2+-compatible router only to find that ADSL2+ compatibility was to be added sometime in the future with a firmware upgrade). I also hate the AirPort Extreme, because what you really pay for is the Apple logo on it, and you get something you can't configure properly (no QoS, no dynamic dns support, you can't configure many options that you can find in most routers).
But then again - it's really hard to tell what's
wrong in your network - replacing the cables are the
first obvious thing to do as it's the cheapest and
quickest way to a solution from this point forward.
Well, I suppose that the jumbo frame thing is the key: I'll try connecting two MBPs with a crossover cable and enabling jumbo frames. Let's see what's the speed then...

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How to improve poor Wireless Performance?

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I have Airport Extreme as the base unit and an Express unit in a room separated by a brick wall to improve signal. Express shows a green light indicating signal but my iPad does not perform well. How can I improve other than hardwire ethernet connection?

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Other suggestions, and more info about the nature of the problem, may be in this Apple tech note.
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How do I improve performance while doing pull, push and delete from Azure Storage Queue

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
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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
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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 =>
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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
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Improving performance:How to know selected rows in af:table through chk box

Hi,
I've a VO which has 3 transient variables. 2 of these transient variables getting the values from a view accessor. Using the other transient variable in the Ui to select the rows in the af:table.
In my UI, I've a table and a Check Box to select the rows. I want to get the selected rows through the check box, in the backing bean for my business requirements.
I've used below logic to get the selected rows. Here, I am iterating through the entire viewobject rows, so it is impacting the performance of the UI. How can I know the selected rows in the bean? or How can I improve the performance?
I also applied below view criteria, but still its not performant.
// ViewCriteria vc = vo.createViewCriteria();
// //.getViewCriteriaManager().getViewCriteria("SelectedMerchantCriteria");
// ViewCriteriaRow vcr = vc.createViewCriteriaRow();
// vc.setCriteriaMode(ViewCriteria.CRITERIA_MODE_CACHE | ViewCriteria.CRITERIA_MODE_QUERY);//MerchantName1
// //vcr.setAttribute("MerchantName1", "1017 CAFE");
// vcr.setAttribute("SelectToMap", "true");
// vc.addRow(vcr);
// vo.applyViewCriteria(vc);
// vo.executeQuery();
public void mapSupplierMerchant2(ActionEvent actionEvent) {
// Add event code here...
OperationBinding method = null;
AdfFacesContext adfFacesContext = AdfFacesContext.getCurrentInstance();
Map pageFlowScope = adfFacesContext.getPageFlowScope();
ArrayList merchantMappingList = new ArrayList();
Long primaryVendorId = null, groupId = null;
CollectionModel tableModel = (CollectionModel) this.getMerchantTable().getValue();
JUCtrlHierBinding tableBinding = (JUCtrlHierBinding) tableModel.getWrappedData();
ViewObject vo = tableBinding.getViewObject();
// ViewCriteria vc = vo.createViewCriteria();
// //.getViewCriteriaManager().getViewCriteria("SelectedMerchantCriteria");
// ViewCriteriaRow vcr = vc.createViewCriteriaRow();
// vc.setCriteriaMode(ViewCriteria.CRITERIA_MODE_CACHE | ViewCriteria.CRITERIA_MODE_QUERY);//MerchantName1
// //vcr.setAttribute("MerchantName1", "1017 CAFE");
// vcr.setAttribute("SelectToMap", "true");
// vc.addRow(vcr);
// vo.applyViewCriteria(vc);
// vo.executeQuery();
List<JUCtrlHierNodeBinding> merchantList = (List<JUCtrlHierNodeBinding>)tableBinding.getChildren();
JUCtrlHierNodeBinding merchantNode = null;
List supToMap = new ArrayList();
boolean isMerchantSelected = false, isMasterSup = false;
Long merchantIdToMap = null, masterSupId = null;
Row r = vo.first();
while(r!=null) {
System.out.println("================================ " + r.getAttribute("MerchantName1") + " " + r.getAttribute("SelectToMap") );
if(r.getAttribute("SelectToMap")!=null) {
isMerchantSelected = (Boolean) r.getAttribute("SelectToMap");
if(isMerchantSelected) {
merchantIdToMap = (Long) r.getAttribute("MerchantMapId");
if(merchantIdToMap!=null) merchantMappingList.add(merchantIdToMap);
r = vo.next();
if(merchantMappingList.size()>0) {
primaryVendorId = (Long) pageFlowScope.get("primaryVendorId");
groupId = (Long) pageFlowScope.get("groupId");
method = (OperationBinding) ADFUtil.findOperation("mapSupplierMerchant");
if(method!=null) {
Map paramMap = method.getParamsMap();
paramMap.put("vendorId", primaryVendorId);
paramMap.put("groupId", groupId);
paramMap.put("merchantList", merchantMappingList);
Boolean result = (Boolean) method.execute();
List errors = method.getErrors();
if(result!=null && result) {
this.getMerchantMappedFlag().setValue(true);
AdfFacesContext.getCurrentInstance().addPartialTarget(this.getMerchantMappedFlag());
AdfFacesContext.getCurrentInstance().addPartialTarget(this.getMerchantTable());
tableBinding.getViewObject().setRangeSize(25);
FacesMessage message = new FacesMessage("The selected merchants have been mapped to the group. Please save the changes. " );//+ adfFacesContext.getPageFlowScope().get("merchantGroupName") );
message.setSeverity(FacesMessage.SEVERITY_INFO);
FacesContext.getCurrentInstance().addMessage(null, message);
} else {
FacesMessage message = new FacesMessage("No merchants have been selected for mapping. Please select atleast one merchant." );//+ adfFacesContext.getPageFlowScope().get("merchantGroupName") );
message.setSeverity(FacesMessage.SEVERITY_ERROR);
FacesContext.getCurrentInstance().addMessage(null, message);
}

Hi
Please check this post [http://adfwithejb.blogspot.in/2012/08/hi-i-came-across-one-common-use-case.html].
It has clear explanation of how to provide a checkbox for selection of rows. You can also go through my comments at the end of the post. That should solve your problem of iterating through the entire VO.
Thanks,
Rakesh

How Can we improve the report performance..?

Hi exports,
I am learning the Business Objects XIR2, Please let me know How Can we improve the report performance..?
Please give the answer in detailed way.

First find out why your report is performing slowly. Then fix it.
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Shortcut joins? Sure, they can help, as long as they are appropriate. [Many times they are not.|http://www.dagira.com/2010/05/27/everything-about-shortcut-joins/]
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HT1651 how can i improve my macbook's performance without installing memory

how can i improve my macbook's performance without installing memory

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At the Apple Icon at top left>About this Mac.
Then click on More Info>Hardware and report this upto *but not including the Serial#*...
Hardware Overview:
Machine Name: Power Mac G5 Quad
Machine Model: PowerMac11,2
CPU Type: PowerPC G5 (1.1)
Number Of CPUs: 4
CPU Speed: 2.5 GHz
L2 Cache (per CPU): 1 MB
Memory: 10 GB
Bus Speed: 1.25 GHz
Boot ROM Version: 5.2.7f1
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NVIDIA GeForce 7800GT:
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Type:          Display
Bus:          PCI
Slot:          SLOT-1
VRAM (Total):          256 MB
Vendor:          nVIDIA (0x10de)
Device ID:          0x0092
Revision ID:          0x00a1
ROM Revision:          2152.2
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How can i improve burning quality of dvd.looks fine in preview on idvd,but final burn quality is poor/

how can i improve burning quality of dvd.looks fine in preview on idvd,but final burn quality is poor.

Had same problem with iPhoto pictures and poor burn quality. Went back to original picture file and dragged images into idvd project from there. Set encoding at professional quality and burned at slowest speed. Got very good result with high quality slideshow when played on TV.
Also tried Old Toad's Aug 30, 2011 advice to get a slideshow into iDVD with transitions, music, etc. from iPhoto.
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How can we improve performance while selection production orders from resb

Dear all,
there is a performance issue in a report which compares sales order and production order.
Below is the code, in this while reading production order data from resb with the below select statement.
can any body tell me how can we improve the performance? should we use indexing, if yes how to use indexing.
*read sales order data
SELECT vbeln posnr arktx zz_cl zz_qty
INTO (itab-vbeln, itab-sposnr, itab-arktx, itab-zz_cl, itab-zz_qty)
FROM vbap
WHERE vbeln = p_vbeln
AND   uepos = p_posnr.
    itab-so_qty = itab-zz_cl * itab-zz_qty / 1000.
    CONCATENATE itab-vbeln itab-sposnr
       INTO itab-document SEPARATED BY '/'.
    CLEAR total_pro.
**read production order data*
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Himanshu,
Put a break point before these two select statements and execute in the production.This way you will come to know which select statement is taking much time to get executed.
In both the select statements the where clause is not having the primary keys.
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As far as the table RESB is concerened here also the where clause doesn't have the primary keys.Do check the SAP Note No:-187906.
I guess not using primary keys is maring the performance.
K.Kiran.

How can I Improve the Performance using Global Temo Tables ??

Hi,
Can anyone tell me , How can i make use of Global Temporary Tables to improve the Performance.
I have few sample scripts ,
Say i have the View based on some Complex query like ,
CREATE OR REPLACE VIEW Profile_values_view AS
SELECT d.Profile_option_name, d.Profile_option_id, Profile_option_value,
u.User_name, Level_id, Level_code
FROM Profile_definitions d, Profile_values v, Profile_users u
WHERE d.Profile_option_id = v.Profile_option_id
AND ((Level_code = 'USER' AND Level_id = U.User_id) OR
(Level_code = 'DEPARTMENT' AND Level_id = U.Department_id) OR
(Level_code = 'SITE'))
AND NOT EXISTS (SELECT 1 FROM PROFILE_VALUES P
WHERE P.PROFILE_OPTION_ID = V.PROFILE_OPTION_ID
AND ((Level_code = 'USER' AND
level_id = u.User_id) OR
(Level_code = 'DEPARTMENT' AND
level_id = u.Department_id) OR
(Level_code = 'SITE'))
AND INSTR('USERDEPARTMENTSITE', v.Level_code) >
INSTR('USERDEPARTMENTSITE', p.Level_code));
Now i have created the Global temp Table as ,
CREATE GLOBAL TEMPORARY TABLE Profile_values_temp
Profile_option_name VARCHAR(60) NOT NULL,
Profile_option_id NUMBER(4) NOT NULL,
Profile_option_value VARCHAR2(20) NOT NULL,
Level_code VARCHAR2(10) ,
Level_id NUMBER(4) ,
CONSTRAINT Profile_values_temp_pk
PRIMARY KEY (Profile_option_id)
) ON COMMIT PRESERVE ROWS ORGANIZATION INDEX;
Now I am Inserting the Records into Temp table as
INSERT INTO Profile_values_temp
(Profile_option_name, Profile_option_id, Profile_option_value,
Level_code, Level_id)
SELECT Profile_option_name, Profile_option_id, Profile_option_value,
Level_code, Level_id
FROM Profile_values_view;
COMMIT;
Now what my doubt is, when do i need to execute the Insert Statement.
Say , if the View returns few millions of records , then loading such a data into Global Temporary table takes lot of time.
Then what is the use of Global Temporary tables and how can i improve the Performance using the same.
Raj

Thanks for the responce ,
There are 2 to 3 complex views in our database, and there always be more than 5000+ users will be workinf on the application and is OLTP application. Those complex views are killing the application performance.
I what i felt was, if i create the Global Temporary tables for thow views and will be able to load the one third million of records returned by the views in to cache and can improve the application performance.
I have created the Global Temporary tables for 2 views with the option On Commit Preserve , But after am inserting the records into the Temp table and when i Issue the commit statement, the Temp table is getting Cleared.
I really got surpised of this behaviour as i know that with the Option On Commit Preserve , the rows should retain in the Temp Table, Instead , it's getting cleared.
Pelase suggest , what to do ??
Raj

How can I improve performance for BC4J/JSP-application

Hi,
I have developed a JSP-Applikcation with the master-detail views. This Application has been implemented
as SSO enabled web portlet into portal. Whenn I click on a row retrieved from the master view (Master.jsp), it take 15 seconds
until the associated data in detail view will be displayed on the other window(Detail.jsp). The master table has about 2500 records and detail table about 7000. (Other case: it takes 2 seconds for 162 rows (master) and 228 rows (detail) respectively)
In Master.jsp I set rangesize = "10" to reduce data loading time.
======================== master.jsp =================================
<jbo:DataSource id="dsMaster appid=testAppId viewobject="MaterView" rangesize="10">
<a href="detail.jsp?RowKeyValue=<jbo:ShowValue datasource="dsMaster" dataitem="RowKey"/>">
Here Click
</a>
==================================================================
Because all records from master view have firstly to be retrieved to locate right row, I set rangesize="-1" in detail.jsp. Consequently this leads to a lower performance.
When rangesize="20" sets instead rangesize="-1", The performance is good, but the wanted Data from detail view are not displayed if the records of master view cliked on ist not in this range.
======================== detail.jsp ======================================
<jbo:DataSource id="dsMaster appid=testAppId viewobject="MaterView" rangesize="-1">
<jbo:RefreshDataSource datasource="dsMaster">
<jbo:Row id="msRow" datasource="dsMaster" action="Find" rowkeyparam="RowkeyValue">
<jbo:dataSource id="dsDetail" appid="testAppId viewobject="DetailView">
======================================================================
Is my programming logic not to be suited for the high performance?
How can I improve the performance, if it is so?
Many thanks for your help.
regards,
Yoo

http://forums.adobe.com/thread/1369260?tstart=0

How can I improve below SQL performance.

Hi,
How can I improve below SQL performance. This SQL consumes CPU and occures wait events. It is running every 10 seconds. When I look at the session information from Enterprise Manager I can see that "Histogram for Wait Event: PX Deq Credit: send blkd"
I created some indexes. I heard that the indexes are not used when there is a NULL but when I checked the xecution plan It uses index.
SELECT i.ID
FROM EXPRESS.invoices i
WHERE i.nbr IS NOT NULL
AND i.EXTRACT_BATCH IS NULL
AND i.SUB_TYPE='COD'
Explain Plan from Toad
SELECT STATEMENT CHOOSECost: 77 Bytes: 6,98 Cardinality: 349
     4 PX COORDINATOR
          3 PX SEND QC (RANDOM) SYS.:TQ10000 Cost: 77 Bytes: 6,98 Cardinality: 349
               2 PX BLOCK ITERATOR Cost: 77 Bytes: 6,98 Cardinality: 349
                    1 INDEX FAST FULL SCAN INDEX EXPRESS.INVC_TRANS_INDX Cost: 77 Bytes: 6,98 Cardinality: 349
Execution Plan from Sqlplus
| Id | Operation | Name | Rows | Bytes | Cost | TQ |IN-OUT| PQ Distrib |
| 0 | SELECT STATEMENT | | 349 | 6980 | 77 | | | |
| 1 | PX COORDINATOR | | | | | | | |
| 2 | PX SEND QC (RANDOM) | :TQ10000 | 349 | 6980 | 77 | Q1,00 | P->S | QC (RAND) |
| 3 | PX BLOCK ITERATOR | | 349 | 6980 | 77 | Q1,00 | PCWC | |
|* 4 | INDEX FAST FULL SCAN| INVC_TRANS_INDX | 349 | 6980 | 77 | Q1,00 | PCWP | |
Predicate Information (identified by operation id):
4 - filter("I"."NBR" IS NOT NULL AND "I"."EXTRACT_BATCH" IS NULL AND "I"."SUB_TYPE"='COD')
Note
- 'PLAN_TABLE' is old version
- cpu costing is off (consider enabling it)
Statistics
141 recursive calls
0 db block gets
5568 consistent gets
0 physical reads
0 redo size
319 bytes sent via SQL*Net to client
458 bytes received via SQL*Net from client
1 SQL*Net roundtrips to/from client
1 sorts (memory)
0 sorts (disk)
0 rows processed
Instance Efficiency Percentages (Target 100%)
Buffer Nowait %: 100.00
Redo NoWait %: 100.00
Buffer Hit %: 99.70
In-memory Sort %: 100.00
Library Hit %: 99.81
Soft Parse %: 99.77
Execute to Parse %: 63.56
Latch Hit %: 90.07
Parse CPU to Parse Elapsd %: 0.81
% Non-Parse CPU: 98.88
Top 5 Timed Events
Event     Waits     Time(s)     Avg Wait(ms)     % Total Call Time     Wait Class
latch: library cache     12,626     16,757     1,327     62.6     Concurrency
CPU time          5,712          21.Mar
latch: session allocation     1,848,987     1,99     1     07.Nis     Other
PX Deq Credit: send blkd     1,242,265     981     1     03.Tem     Other
PX qref latch     1,405,819     726     1     02.Tem     Other
The database version is 10.2.0.1 but we haven't installed the patch 10.2.0.5. yet.
I am waiting your comments.
Thanks in advance

Welcome to the forum.
I created some indexes. I heard that the indexes are not used when there is a NULL but when I checked the xecution plan It uses index. What columns are indexed?
And what do:
select i.sub_type
,      count(*)
from   express.invoices i
where i.nbr is not null
and    i.extract_batch is null
group by i.sub_type; and
select i.sub_type
,      count(*)
from   express.invoices i
group by i.sub_type; return?
Also, try use the {noformat}{noformat} tag when posting examples/execution plans etc.
See: HOW TO: Post a SQL statement tuning request - template posting for more tuning instructions.
It'll make a big difference:
SELECT i.ID
FROM EXPRESS.invoices i
WHERE i.nbr IS NOT NULL
AND i.EXTRACT_BATCH IS NULL
AND i.SUB_TYPE='COD'
Explain Plan from Toad
SELECT STATEMENT CHOOSECost: 77 Bytes: 6,98 Cardinality: 349
     4 PX COORDINATOR
          3 PX SEND QC (RANDOM) SYS.:TQ10000 Cost: 77 Bytes: 6,98 Cardinality: 349
               2 PX BLOCK ITERATOR Cost: 77 Bytes: 6,98 Cardinality: 349
                    1 INDEX FAST FULL SCAN INDEX EXPRESS.INVC_TRANS_INDX Cost: 77 Bytes: 6,98 Cardinality: 349
Execution Plan from Sqlplus
| Id | Operation | Name | Rows | Bytes | Cost | TQ |IN-OUT| PQ Distrib |
| 0 | SELECT STATEMENT | | 349 | 6980 | 77 | | | |
| 1 | PX COORDINATOR | | | | | | | |
| 2 | PX SEND QC (RANDOM) | :TQ10000 | 349 | 6980 | 77 | Q1,00 | P->S | QC (RAND) |
| 3 | PX BLOCK ITERATOR | | 349 | 6980 | 77 | Q1,00 | PCWC | |
|* 4 | INDEX FAST FULL SCAN| INVC_TRANS_INDX | 349 | 6980 | 77 | Q1,00 | PCWP | |
Predicate Information (identified by operation id):
4 - filter("I"."NBR" IS NOT NULL AND "I"."EXTRACT_BATCH" IS NULL AND "I"."SUB_TYPE"='COD')
Note
- 'PLAN_TABLE' is old version
- cpu costing is off (consider enabling it)
Statistics
141 recursive calls
0 db block gets
5568 consistent gets
0 physical reads
0 redo size
319 bytes sent via SQL*Net to client
458 bytes received via SQL*Net from client
1 SQL*Net roundtrips to/from client
1 sorts (memory)
0 sorts (disk)
0 rows processed
Instance Efficiency Percentages (Target 100%)
Buffer Nowait %: 100.00
Redo NoWait %: 100.00
Buffer Hit %: 99.70
In-memory Sort %: 100.00
Library Hit %: 99.81
Soft Parse %: 99.77
Execute to Parse %: 63.56
Latch Hit %: 90.07
Parse CPU to Parse Elapsd %: 0.81
% Non-Parse CPU: 98.88
Top 5 Timed Events
Event     Waits     Time(s)     Avg Wait(ms)     % Total Call Time     Wait Class
latch: library cache     12,626     16,757     1,327     62.6     Concurrency
CPU time          5,712          21.Mar
latch: session allocation     1,848,987     1,99     1     07.Nis     Other
PX Deq Credit: send blkd     1,242,265     981     1     03.Tem     Other
PX qref latch     1,405,819     726     1     02.Tem     Other

How can I improve performance when scopes are open?

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When Color correcting, performance severely lags, stalls, freezes!
Nothing to complex...simple 3 way color corrector, occasional curves filters.
I am constantly waiting for the timeline to update as I move around....sometimes as long as a minute or so.
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Jay

http://forums.adobe.com/thread/1369260?tstart=0

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Hi,
How can I improve an Import/ Export performance?
Also any good links to learn about Datapump Please?
Thanks,
Felipe.

F. Munoz Alvarez wrote:
Dear Felipe,
Please take a look on this excellent notes by Chris Foot about datapump:
* http://www.dbazine.com/blogs/blog-cf/chrisfoot/blogentry.2006-06-08.1893574515
* http://www.dbazine.com/blogs/blog-cf/chrisfoot/blogentry.2006-06-02.2786242018
* http://www.dbazine.com/blogs/blog-cf/chrisfoot/blogentry.2006-05-26.3042156388
* http://www.dbazine.com/blogs/blog-cf/chrisfoot/blogentry.2006-05-19.6918984141
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