Server Performance problems

Hi
Not sure whether its right forum to post this, I'm using server for long time and its performance is getting bad, Can somebody suggest how I can speed up its performance?
Any suggestions
Thanks in advance
Srikant

This has some good meat in it.
https://media.sdn.sap.com/html/submitted_docs/Best_Practices/EP/documentation/How-to_Guides/22_HowToFineTune_EP6SP1.pdf
Also, a few customers as well as SAP itself have told me that I should recycle my portal once per week. I could not believe they would say or do this when I heard it but it does make a difference. I have a script that does it once per week on our non-production systems.

Similar Messages

Oracle Web App Server performance problems

I am evaluating Oracle Web Application Server 3.0 and while
everything seems to work ok, the performance is noticeably
slower than Oracle Web Server 1.0 or 2.0. I have narrowed the
problem down to the access/execution time to a database
package. In other words, the PL/SQL code I have built does not
contain any Oracle SQL statements. The package simply builds a
small web page. If I had to guess, I would say it appears to be
related to either a log-in to Oracle (which does not take that
long in a ProC program) or excessive child process creation
overhead (other programs like Apache handle this just fine). I
created the package in the www_user account, set a virtual path
of /test/owa/ to access it and while the page displays
correctly, it takes about 12 to 13 seconds to do so.
I'm running Linux on a Dell 400 MHz Pentium II with 1 Gb of
ram. I have tried changing the cartridge configuration so that
it starts with 2 processes instead of the default 0. This
helped some after the first execution of the package (response
time went from 12 seconds down to about 7). I am running it
without security on the virtual path (I thought maybe that was
slowing things down). I tried setting the user sessions to true
(default was false) and setting a timeout of 1200. None of
these things helped (nor did they make it any worse).
On an old HP system (much slower SQLPlus response time than this
Dell system), web pages fly at a pretty good speed using PL/SQL
and version 2 of the web server. Except for the actual database
query time to perform SQL queries, pages display in subsecond
time frames; not 12 seconds.
Please give me some idea how to improve the performance.
Obviously, something is different with 3.0 than the older wrb
and server.
Thanks,
Bob
[email protected]
null

I am evaluating Oracle Web Application Server 3.0 and while
everything seems to work ok, the performance is noticeably
slower than Oracle Web Server 1.0 or 2.0. I have narrowed the
problem down to the access/execution time to a database
package. In other words, the PL/SQL code I have built does not
contain any Oracle SQL statements. The package simply builds a
small web page. If I had to guess, I would say it appears to be
related to either a log-in to Oracle (which does not take that
long in a ProC program) or excessive child process creation
overhead (other programs like Apache handle this just fine). I
created the package in the www_user account, set a virtual path
of /test/owa/ to access it and while the page displays
correctly, it takes about 12 to 13 seconds to do so.
I'm running Linux on a Dell 400 MHz Pentium II with 1 Gb of
ram. I have tried changing the cartridge configuration so that
it starts with 2 processes instead of the default 0. This
helped some after the first execution of the package (response
time went from 12 seconds down to about 7). I am running it
without security on the virtual path (I thought maybe that was
slowing things down). I tried setting the user sessions to true
(default was false) and setting a timeout of 1200. None of
these things helped (nor did they make it any worse).
On an old HP system (much slower SQLPlus response time than this
Dell system), web pages fly at a pretty good speed using PL/SQL
and version 2 of the web server. Except for the actual database
query time to perform SQL queries, pages display in subsecond
time frames; not 12 seconds.
Please give me some idea how to improve the performance.
Obviously, something is different with 3.0 than the older wrb
and server.
Thanks,
Bob
[email protected]
null

(new?) performance problem using jDriver after a Sql Server 6.5 to 2000 conversion

Hi,
This is similar - yet different - to a few of the old postings about performance
problems with using jdbc drivers against Sql Server 7 & 2000.
Here's the situation:
I am running a standalone java application on a Solaris box using BEA's jdbc driver
to connect to a Sql Server database on another network. The application retrieves
data from the database through joins on several tables for approximately 40,000
unique ids. It then processes all of this data and produces a file. We tuned
the app so that the execution time for a single run through the application was
24 minutes running against Sql Server 6.5 with BEA's jdbc driver. After performing
a DBMS conversion to upgrade it to Sql Server 2000 I switched the jDriver to the
Sql Server 2000 version. I ran the app and got an alarming execution time of
5hrs 32 min. After some research, I found the problem with unicode and nvarchar/varchar
and set the "useVarChars" property to "true" on the driver. The execution time
for a single run through the application is now 56 minutes.
56 minutes compared to 5 1/2 hrs is an amazing improvement. However, it is still
over twice the execution time that I was seeing against the 6.5 database. Theoretically,
I should be able to switch out my jdbc driver and the DBMS conversion should be
invisible to my application. That would also mean that I should be seeing the
same execution times with both versions of the DBMS. Has anybody else seen a
simlar situation? Are there any other settings or fixes that I can put into place
to get my performance back down to what I was seeing with 6.5? I would rather
not have to go through and perform another round of performance tuning after having
already done this when the app was originally built.
thanks,
mike

Mike wrote:
Joe,
This was actually my next step. I replaced the BEA driver with
the MS driver and let it run through with out making any
configuration changes, just to see what happened. I got an
execution time of about 7 1/2 hrs (which was shocking). So,
(comparing apples to apples) while leaving the default unicode
property on, BEA ran faster than MS, 5 1/2 hrs to 7 1/2 hrs.
I then set the 'SendStringParametersAsUnicode' to 'false' on the
MS driver and ran another test. This time the application
executed in just over 24 minutes. The actual runtime was 24 min
16 sec, which is still ever so slightly above the actual runtime
against SS 6.5 which was 23 min 35 sec, but is twice as fast as the
56 minutes that BEA's driver was giving me.
I think that this is very interesting. I checked to make sure that
there were no outside factors that may have been influencing the
runtimes in either case, and there were none. Just to make sure,
I ran each driver again and got the same results. It sounds like
there are no known issues regarding this?
We have people looking into things on the DBMS side and I'm still
looking into things on my end, but so far none of us have found
anything. We'd like to continue using BEA's driver for the
support and the fact that we use Weblogic Server for all of our
online applications, but this new data might mean that I have to
switch drivers for this particular application.Thanks. No, there is no known issue, and if you put a packet sniffer
between the client and DBMS, you will probably not see any appreciable
difference in the content of the SQL sent be either driver. My suspicion is
that it involves the historical backward compatibility built in to the DBMS.
It must still handle several iterations of older applications, speaking obsolete
versions of the DBMS protocol, and expecting different DBMS behavior!
Our driver presents itself as a SQL7-level application, and may well be treated
differently than a newer one. This may include different query processing.
Because our driver is deprecated, it is unlikely that it will be changed in
future. We will certainly support you using the MS driver, and if you look
in the MS JDBC newsgroup, you'll see more answers from BEA folks than
from MS people!
Joe
>
>
Mike
The next test you should do, to isolate the issue, is to try another
JDBC driver.
MS provides a type-4 driver now, for free. If it is significantly faster,
it would be
interesting. However, it would still not isolate the problem, because
we still would
need to know what query plan is created by the DBMS, and why.
Joe Weinstein at BEA
PS: I can only tell you that our driver has not changed in it's semantic
function.
It essentially send SQL to the DBMS. It doesn't alter it.

Performance Problem Database Server on Solaris 10 5/08 (Update 5) v890 Box

Hello,
I am having performance problems on Solaris 10 5/08 (Update 5) Production server below I have mentioned the details information about the system and some command iostat and vmstat reports:
Sun Fire V890
Ram 32 GB
Physical CPU 8 (Logical 16)
Application Oracle 10G
Raid 1
1) iostat report
extended device statistics tty
device r/s w/s kr/s kw/s wait actv svc_t %w %b tin tout
md100 0.3 7.0 2.4 7.0 0.0 0.2 38.5 3 4 0 0
2/md3100 205.0 27.4 23099.6 472.2 0.0 2.5 10.9 0 79
2/md3200 225.3 27.3 24993.8 577.3 0.0 2.6 10.5 0 81
2/md3300 295.8 25.5 31538.0 412.5 0.0 3.1 9.8 0 84
2/md3400 198.3 25.6 21032.9 423.7 0.0 2.2 9.8 0 65
2/md3500 55.0 313.0 2397.5 2425.9 0.0 1.2 3.2 0 93
2/md3600 0.1 19.2 0.8 1440.0 0.0 0.1 5.4 0 10
2/md3700 3.1 0.8 48.8 35.7 0.0 0.0 9.3 0 4
2/md3800 300.4 0.7 30651.9 69.4 0.0 2.6 8.7 0 92
2/md3900 359.9 0.7 35876.8 56.6 0.0 3.3 9.1 0 95
2/md4100 0.6 512.1 9.6 1815.8 0.0 1.2 2.4 0 70
2/md4200 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0 0
2) vmstat report
kthr memory page disk faults cpu
r b w swap free re mf pi po fr de sr 2m 2m 2m 2m in sy cs us sy id
1 20 0 39126264 11482648 2570 5039 16336 14 14 0 1 41 38 47 61 71072 41785 30463 51 14 35
0 16 0 40580912 9157288 273 2366 0 8 7 0 0 198 310 251 192 49207 47702 29823 39 8 53
0 16 0 40588992 9163784 187 1392 0 8 8 0 0 251 278 212 163 47310 44840 27821 31 7 62
0 12 0 40597208 9171640 624 3168 0 2 2 0 0 298 329 209 245 49150 44768 26264 29 8 62
0 13 0 40577400 9158032 425 4452 0 9 8 0 0 177 181 331 292 49149 42545 25544 31 8 61
0 14 0 40576680 9156328 868 6027 0 8 7 0 0 161 234 259 327 48726 41187 26184 26 9 65
0 13 0 40567952 9151360 1067 7302 0 3 3 0 0 254 386 256 160 50388 45422 26596 31 10 60
0 13 0 40565160 9150880 838 6582 0 9 8 0 0 257 289 236 281 49697 45190 26925 31 10 60
0 12 0 40568616 9153128 640 4880 0 11 10 0 0 334 206 214 214 48738 43552 26431 27 9 65
0 12 0 40581696 9163248 799 5895 0 2 2 0 0 426 273 138 226 47831 41873 26301 30 9 61
0 11 0 40572096 9157896 1087 7138 1 10 9 0 0 337 163 220 305 53124 55371 27933 45 11 44
0 18 0 40520032 9123424 868 5946 0 10 9 0 0 222 218 170 249 51322 49556 27867 40 10 50
0 17 0 40528544 9130112 481 3257 0 1 1 0 0 276 269 145 316 56103 44359 27645 39 9 51
0 15 0 40521776 9126208 490 3174 0 10 8 0 0 240 305 226 222 55839 43464 27003 42 10 48
0 15 0 40491176 9101072 769 4149 0 8 8 0 0 297 362 150 317 59718 55624 34333 43 11 46
0 17 0 40603696 9183224 785 4364 0 2 2 0 0 314 234 281 238 62990 67554 39122 43 12 45
0 19 0 40622592 9215816 711 5308 1 12 12 0 0 390 167 252 283 65340 60514 30525 45 12 44
0 17 0 40662248 9276136 767 5113 0 10 8 0 0 218 280 298 221 63734 53314 31029 43 11 45
3) SAR CPU Utilization report
12:30:51 %usr %sys %wio %idle
12:31:01 41 9 0 50
12:31:11 43 11 0 46
12:31:21 42 11 0 47
12:31:31 44 12 0 44
12:31:41 42 11 0 47
Average 42 11 0 47
Anybody have any comment regarding the reports ?
Thanks for your help,
Srikanta Sanpui

A suggestion: if you use the code tags with your output it will be a great deal easier to read.
extended device statistics tty
device r/s w/s kr/s kw/s wait actv svc_t %w %b tin tout
md100 0.3 7.0 2.4 7.0 0.0 0.2 38.5 3 4 0 0
2/md3100 205.0 27.4 23099.6 472.2 0.0 2.5 10.9 0 79
2/md3200 225.3 27.3 24993.8 577.3 0.0 2.6 10.5 0 81
2/md3300 295.8 25.5 31538.0 412.5 0.0 3.1 9.8 0 84
2/md3400 198.3 25.6 21032.9 423.7 0.0 2.2 9.8 0 65
2/md3500 55.0 313.0 2397.5 2425.9 0.0 1.2 3.2 0 93
2/md3600 0.1 19.2 0.8 1440.0 0.0 0.1 5.4 0 10
2/md3700 3.1 0.8 48.8 35.7 0.0 0.0 9.3 0 4
2/md3800 300.4 0.7 30651.9 69.4 0.0 2.6 8.7 0 92
2/md3900 359.9 0.7 35876.8 56.6 0.0 3.3 9.1 0 95
2/md4100 0.6 512.1 9.6 1815.8 0.0 1.2 2.4 0 70
2/md4200 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0 0

MS SQL Server 2008 performance problem

We use TopLink 10.1.3.5 to connect to MS SQL Server 2008.
What we are seeing is that when a query is being run by TopLink a lot of cursors open up and remain open. Our database CPU usage goes up and it affects the whole application.
Our DBA took a look at it and said the database shows FETCH_APICURSOR* being used for select statements.
Is there a way to tell TopLink not to use cursors for queries?
Thanks.

Can you pin point a particular TopLink query tied to the " FETCH_APICURSOR* " call in the app and post how it is being created?
My guess is that the application is specifying the TopLink query object to return a cursor or stream and not closing it in all cases, or keeping them open for a long period - did you say they were leaking, or is it just that a large number are open at a time leading to performance problems?
This streams+cursors are described in the TopLink docs here
http://docs.oracle.com/cd/E21764_01/web.1111/b32441/qryadv.htm#CJGJBHGJ
or the 10g docs here:
http://sqltech.cl/doc/oas10gR3/web.1013/b13593/qryadv010.htm
If this is the case, you might want to use a different strategy such as pagination instead of cursors, described here:
http://docs.oracle.com/cd/E17904_01/web.1111/b32441/optimiz.htm#CHDIBGFE
Best Regards,
Chris

SAP Performance Problem with Oracle 10 on Sun SPARC T5240 server

Dear Friends,
We have a performance problem after migrating our SAP ERP 6.0 basis system. We moved to new servers a month ago.
According to SAP EarlyWatchAlert Report, CPU response time is too high, altough CPU utilization is never more than 5%,
The current system is :
Database server : Sun SPARC Enterprise T5240 Server - 2 CPU´s with 6 core, 8 thread, 1.2 Ghz 32 GB RAM
and we use another identical configured server as an application server.
Database is Oracle 10.2.0 and operating system is Solaris 10.
The problem is average CPU response time is 450 ms, and max. CPU load is %5 percent.
Pre-migration configuration with old servers, we had CPU response : 150 ms and max CPU load: 50%.
Old configuration : 2 X HP rp3440, 2 X PA 8800 CPU (2 core, 1.0 GHz).
Have you got any experience with a similar situation, which setting might be wrong for not fully utilizing server CPU´s?
or do you know any similar configuration for benchmark?
Thanks in advance
Uzan

Our organization upgraded an application - The vendor had originally suggested a T2000. When we finally migrated onto it, the performance was worse than the older version of the application. The vendor hadn't yet tested the combination of T2000 and 10.2 with their application when they had made that hardware recommendation, they subsequently revised their recommendations. We ended up with an M4000.
The application performance, IMHO, still stinks. But that's because it's a java based application written for database independence.
The interesting item to note here, is that in the application teams 'selective' testing - everything worked fine. When the testing was extended to include users who didn't follow the 'test plan', they found performance begin to tank. Then with more users, more testing, they found that the T2000 was not going to perform well. The test plan by the apps team was not sufficient to find the issues, and they did not include any load testing!
Edited by: dbtoo on Jun 5, 2009 11:20 AM

Performance problems when running PostgreSQL on ZFS and tomcat

Hi all,
I need help with some analysis and problem solution related to the below case.
The long story:
I'm running into some massive performance problems on two 8-way HP ProLiant DL385 G5 severs with 14 GB ram and a ZFS storage pool in raidz configuration. The servers are running Solaris 10 x86 10/09.
The configuration between the two is pretty much the same and the problem therefore seems generic for the setup.
Within a non-global zone Im running a tomcat application (an institutional repository) connecting via localhost to a Postgresql database (the OS provided version). The processor load is typically not very high as seen below:
NPROC USERNAME SWAP   RSS MEMORY      TIME CPU
    49 postgres 749M 669M   4,7%   7:14:38 13%
     1 jboss    2519M 2536M    18% 50:36:40 5,9%We are not 100% sure why we run into performance problems, but when it happens we experience that the application slows down and swaps out (according to below). When it settles everything seems to turn back to normal. When the problem is acute the application is totally unresponsive.
NPROC USERNAME SWAP   RSS MEMORY      TIME CPU
    1 jboss    3104M 913M   6,4%   0:22:48 0,1%
#sar -g 5 5
SunOS vbn-back 5.10 Generic_142901-03 i86pc    05/28/2010
07:49:08 pgout/s ppgout/s pgfree/s pgscan/s %ufs_ipf
07:49:13    27.67   316.01   318.58 14854.15     0.00
07:49:18    61.58   664.75   668.51 43377.43     0.00
07:49:23   122.02 1214.09 1222.22 32618.65     0.00
07:49:28   121.19 1052.28 1065.94 5000.59     0.00
07:49:33    54.37   572.82   583.33 2553.77     0.00
Average     77.34   763.71   771.43 19680.67     0.00Making more memory available to tomcat seemed to worsen the problem or at least didnt prove to have any positive effect.
My suspicion is currently focused on PostgreSQL. Turning off fsync boosted performance and made the problem less often to appear.
An unofficial performance evaluation on the database with vacuum analyze took 19 minutes on the server and only 1 minute on a desktop pc. This is horrific when taking the hardware into consideration.
The short story:
Im trying different steps but running out of ideas. Weve read that the database block size and file system block size should match. PostgreSQL is 8 Kb and ZFS is 128 Kb. I didnt find much information on the matter so if any can help please recommend how to make this change
Any other recommendations and ideas we could follow? We know from other installations that the above setup runs without a single problem on Linux on much smaller hardware without specific tuning. What makes Solaris in this configuration so darn slow?
Any help appreciated and I will try to provide additional information on request if needed
Thanks in advance,
Kasper

raidz isnt a good match for databases. Databases tend to require good write performance for which mirroring works better.
Adding a pair of SSD's as a ZIL would probably also help, but chances are its not an option for you..
You can change the record size by "zfs set recordsize=8k <dataset>"
It will only take effect for newly written data. Not existing data.

Performance problems with DFSN, ABE and SMB

Hello,
We have identified a problem with DFS-Namespace (DFSN), Access Based Enumeration (ABE) and SMB File Service.
Currently we have two Windows Server 2008 R2 servers providing the domain-based DFSN in functional level Windows Server 2008 R2 with activated ABE.
The DFSN servers have the most current hotfixes for DFSN and SMB installed, according to http://support.microsoft.com/kb/968429/en-us and http://support.microsoft.com/kb/2473205/en-us
We have only one AD-site and don't use DFS-Replication.
Servers have 2 Intel X5550 4 Core CPUs and 32 GB Ram.
Network is a LAN.
Our DFSN looks like this:
\\contoso.com\home
   Contains 10.000 Links
   Drive mapping on clients to subfolder \\contoso.com\home\username
\\contoso.com\group
   Contains 2500 Links
   Drive mapping on clients directly to \\contoso.com\group
On \\contoso.com\group we serve different folders for teams, projects and other groups with different access permissions based on AD groups.
We have to use ABE, so that users see only accessible Links (folders)
We encounter sometimes multiple times a day enterprise-wide performance problems for 30 seconds when accessing our Namespaces.
After six weeks of researching and analyzing we were able to identify the exact problem.
Administrators create a new DFS-Link in our Namespace \\contoso.com\group with correct permissions using the following command line:
dfsutil.exe link \\contoso.com\group\project123 \\fileserver1\share\project123
dfsutil.exe property sd grant \\contoso.com\group\project123 CONTOSO\group-project123:RX protect replace
This is done a few times a day.
There is no possibility to create the folder and set the permissions in one step.
DFSN process on our DFSN-servers create the new link and the corresponding folder in C:\DFSRoots.
At this time, we have for example 2000+ clients having an active session to the root of the namespace \\contoso.com\group.
Active session means a Windows Explorer opened to the mapped drive or to any subfolder.
The file server process (Lanmanserver) sends a change notification (SMB-Protocol) to each client with an active session \\contoso.com\group.
All the clients which were getting the notification now start to refresh the folder listing of \\contoso.com\group
This was identified by an network trace on our DFSN-servers and different clients.
Due to ABE the servers have to compute the folder listing for each request.
DFS-Service on the servers doen't respond for propably 30 seconds to any additional requests. CPU usage increases significantly over this period and went back to normal afterwards. On our hardware from about 5% to 50%.
Users can't access all DFS-Namespaces during this time and applications using data from DFS-Namespace stop responding.
Side effect: Windows reports on clients a slow-link detection for \\contoso.com\home, which can be offline available for users (described here for WAN-connections: http://blogs.technet.com/b/askds/archive/2011/12/14/slow-link-with-windows-7-and-dfs-namespaces.aspx)
Problem doesn't occure when creating a link in \\contoso.com\home, because users have only a mapping to subfolders.
Currently, the problem doesn't occure also for \\contoso.com\app, because users usually don't use Windows Explorer accessing this mapping.
Disabling ABE reduces the DFSN freeze time, but doesn't solve the problem.
Problem also occurs with Windows Server 2012 R2 as DFSN-server.
There is a registry key available for clients to avoid the reponse to the change notification (NoRemoteChangeNotify, see http://support.microsoft.com/kb/812669/en-us)
This might fix the problem with DFSN, but results in other problems for the users. For example, they have to press F5 for refreshing every remote directory on change.
Is there a possibility to disable the SMB change notification on server side ?
TIA and regards,
Ralf Gaudes

Hi,
Thanks for posting in Microsoft Technet Forums.
I am trying to involve someone familiar with this topic to further look at this issue. There might be some time delay. Appreciate your patience.
Thank you for your understanding and support.
Regards.
We
are trying to better understand customer views on social support experience, so your participation in this
interview project would be greatly appreciated if you have time.
Thanks for helping make community forums a great place.

Performance problems with File Adapter and XI freeze

Hi NetWeaver XI geeks,
We are deploying a XI based product and encounter some huge performance problems. Here after the scenario and the issues:
- NetWeaver XI 2004
- SAP 4.6c
- Outbound Channel
- No mapping used and only the iDocs Adapter is involved in the pipeline processing
- File Adapter
- message file size < 2Ko
We have zeroed down the problem to Idoc adapters performance.
We are using a file channel and every 15 seconds a file in a valid Idoc format is placed in a folder, Idoc adapter picks up the file from this folder and sends it to the SAP R/3 instance.
For few minutes (approx 5 mins) it works (the CPU usage is less then 20% even if processing time seems huge : <b>5sec/msg</b>) but after this time the application gets blocked and the CPU gets overloaded at 100% (2 processes disp_worker.exe at 50% each).
If we inject several files in the source folder at the same time or if we decrease the time gap (from 15 seconds to 10 seconds) between creation of 2 Idoc files , the process blocks after posting 2-3 docs to SAP R/3.
Could you point us some reasons that could provoke that behavior?
Basically looking for some help in improving performance of the Idoc adapter.
Thanks in advance for your help and regards,
Adalbert

Hi Bhavesh,
Thanks for your suggestions. We will test...
We wonder if the hardware is not the problem of this extremely poor performance.
Our XI server is:
     Windows 2003 Server
     Processors: 2x3GHZ
     RAM: 4GB (the memory do not soak)
The messages are well formed iDocs = single line INVOICES.
Some posts are talking 2000 messages processed in some seconds... whereas we got 5 sec per message.
Tnanks for your help.
Adalbert

Exchange 2013 CU7 server performance/outage issues.

Hi Forum,
We are constantly faced with incidents from users that the connections are lost with the exchange server. As a result, we hired a consultant to install an new Exchange 2013 environment based on the Microsoft, VM-Ware and NetApp best practices.
We are still having problems with performance issues. From the client prospective, the performance has not changed, weekly hangs are still happening and I’m at my wits end.
This is our configuration:
2 Windows Server 2012 R2 CAS and DB
VM with 4 vCpu, 16GB, 1 Vmxnet3, IPv6 disabled (the Microsoft way)
VM Ware 5.1 U1
Cluster without AAP
DB1 active on Server 1 (Datacenter 1 with 3 host cluster)
DB2 active on Server 2 (Datacenter 2 with 3 host cluster)
Veeam 8 Backup (Move-ActiveMailboxDatabase DB2 -ActivateOnServer Server1 , backup server 2 then Move-ActiveMailboxDatabase back to
Server2.
Exchange is in Online-Mode due to Citrix XD VDI clients.
1300 Mailboxes and 750 users.
NetApp with SATA disks. (1.5TB E: Vol for DB1/1.5TB F: Vol for DB2)
No archiving
Unlimited mailbox sizes.
The problems are:
If we migrate a non-Exchange VM in the same cluster or to\from the same host, this results in a 30 second to 5 min Outlook outage;
If we make both DB’s active on mail server 1 and reboot server 2, this results in a 30 second to 5 min Outlook outage;
If we make both DB’s active on mail server 1 and do a Veeam backup of server 2, sometimes one of the DB’s go back to server 1, on its own;
While monitoring we see that the w3wp.exe and the Microsoft.Exchange.Store.worker.exe are consuming most of the cpu and memory;
What can I do to solve the outages?
Tnx. Timotatty.
Exchange server performance issues.
Hi Forum,
We are constantly faced with incidents from users that the connections are lost with the exchange server. As a result, we hired a consultant to install an new Exchange 2013 environment based on the Microsoft, VM-Ware and NetApp best practices.
We are still having problems with performance issues. From the client prospective, the performance has not changed, weekly hangs are still happening and I’m at my wits end.
This is our configuration:
2 Windows Server 2012 R2 CAS and DB
VM with 4 vCpu, 16GB, 1 Vmxnet3, IPv6 disabled (the Microsoft way)
VM Ware 5.1 U1
Cluster without AAP
DB1 active on Server 1 (Datacenter 1 with 3 host cluster)
DB2 active on Server 2 (Datacenter 2 with 3 host cluster)
Veeam 8 Backup (Move-ActiveMailboxDatabase DB2 -ActivateOnServer Server1 , backup server 2 then Move-ActiveMailboxDatabase back to
Server2.
Exchange is in Online-Mode due to Citrix XD VDI clients.
1300 Mailboxes and 750 users.
NetApp with SATA disks. (1.5TB E: Vol for DB1/1.5TB F: Vol for DB2)
No archiving
Unlimited mailbox sizes.
The problems are:
If we migrate a non-Exchange VM in the same cluster or to\from the same host, this results in a 30 second to 5 min Outlook outage;
If we make both DB’s active on mail server 1 and reboot server 2, this results in a 30 second to 5 min Outlook outage;
If we make both DB’s active on mail server 1 and do a Veeam backup of server 2, sometimes one of the DB’s go back to server 1, on its own;
While monitoring we see that the w3wp.exe and the Microsoft.Exchange.Store.worker.exe are consuming most of the cpu and memory;
What can I do to solve the outages?
Tnx. Timotatty.

Hi Simon,<o:p></o:p>
Apparently we are using basic authentication which result in a FailingCode=401 as seen in the Event Log under Active Monitoring --> Probe Results from ECP and others. This
became apparent after reading this blog:
http://blogs.technet.com/b/ehlro/archive/2014/02/20/exchange-2013-managed-availability-healthset-troubleshooting.aspx<o:p></o:p>
We are now overriding some of the monitors which require Forms Based Authentication.<o:p></o:p>
Regarding the other 2 issues we have changed the licensing model for Veeam 8 to allow full throughput which will reduce the backup time and add compression.
The KEMP support team helped us by deselecting Use HTTP/1.1 under View/Modify Services --> ECP –> Modify --> Real Servers. This
now only flags a service (ECP or ActiveSync or OWA) as being down instead of an etire server should one component fail.<o:p></o:p>
I am satisfied but still not happy with the steps required to troubleshoot an Unhealthy Health Sets:<o:p></o:p>
Invoke-MonitoringProbe always returns with: WARNING: Could not find assembly or object type associated with monitor identity '<Healthe Set >\< Probe >'. Please ensure
that the given monitor identity exists on the server.
This makes it very difficult to troubleshoot
Unhealthy Health Sets.
Regards,
Timotatty

Performance problems after installing XP Service Pack 3

Hello,
After upgrading my client XP-machine to Service Pack 3, I have serious performance issues working with ApEx. Firstly, establishing the connection to the ApEx Workspace and then logging in both are very slow. Navigating through the workspace works fine, however when I then open any page for editing and/or try to run it, again it is very slow. As we work with PL/sql Embedded gateway I have changed the parameter SHARED_SERVERS to 10, but this did not make any difference. Remotely connecting to this server in other ways such as ping, connecting to xmlpserver, mapping network drives and connecting to the database all work fine.
My collegues also working witk Service Pack 3 have no performance issues. However when I performed a rollback of the XP Service Pack 3, the performance issue was gone!
Does anyone know of any issues similar to this problem?
Regards,
Ben van Dort

This issue is probably related to an update of InternetExplorer by Service Pack 3. Working with Firefox instead of IE gives no performance problems whatsoever.
Version of IE after Service Pack 3: 6.0.2900.5512.xpsp_sp3_gdr.080814-1236CO
Ben

Query Performance Problem!! Oracle 25 minutes || SQLServer 3 minutes

Hi all,
I'm having a performance problem with this query bellow. It runs in 3 minutes on SQLServer and 25 minutes in Oracle.
SELECT
CASE WHEN (GROUPING(a.estado) = 1) THEN 'TOTAL'
ELSE ISNULL(a.estado, 'UNKNOWN')
END AS estado,
CASE WHEN (GROUPING(m.id_plano) = 1) THEN 'GERAL'
ELSE ISNULL(m.id_plano, 'UNKNOWN')
END AS id_plano,
sum(m.valor_2s_parcelas) valor_2s_parcelas,
convert(decimal(15,2),convert(int,sum(convert(int,(m.valor_2s_parcelas+.0000000001)*100)*
isnull(e.percentual,0.0))/100.0+.0000000001))/100 BB_Educar
FROM
movimento_dco m ,
evento_plano e,
agencia_tb a
WHERE
m.id_plano = e.id_plano
AND m.agencia *= a.prefixo
--AND m.id_plano LIKE 'pm60%'
AND m.data_pagamento >= '20070501'
AND m.data_pagamento <= '20070531'
AND m.codigo_retorno = '00'
AND m.id_parcela > 1
AND m.valor_2s_parcelas > 0.
AND e.id_evento = 'BB-Educar'
AND a.banco_id = '001'
AND a.ordem = '00'
group by m.id_plano, a.estado WITH ROLLUP
order by a.estado, m.id_plano DESC
Can anyone help me with this query?

What version of Oracle, what version of SQL? Are the tables the same exact size? are they both indexed the same? Are you running on the some or similar hardware? Are the Oracle parameters similar like SGA size and PGA_AGGREGATE Target? Did you run statistics in Oracle?
Did you compare execution plans in SQL Server vs Oracle to see if SQl Servers execution plan is more superior than the one Oracle is trying to use? (most likely stale statistics).
There are many variables and we need more information than just the Query : ).

URGENT------MB5B : PERFORMANCE PROBLEM

Hi,
We are getting the time out error while running the transaction MB5B. We have posted the same to SAP global support for further analysis, and SAP revrted with note 1005901 to review.
The note consists of creating the Z table and some Z programs to execute the MB5B without time out error, and SAP has not provided what type logic has to be written and how we can be addressed this.
Could any one suggest us how can we proceed further.
Note as been attached for reference.
Note 1005901 - MB5B: Performance problems
Note Language: English Version: 3 Validity: Valid from 05.12.2006
Summary
Symptom
o The user starts transaction MB5B, or the respective report
RM07MLBD, for a very large number of materials or for all materials
in a plant.
o The transaction terminates with the ABAP runtime error
DBIF_RSQL_INVALID_RSQL.
o The transaction runtime is very long and it terminates with the
ABAP runtime error TIME_OUT.
o During the runtime of transaction MB5B, goods movements are posted
in parallel:
- The results of transaction MB5B are incorrect.
- Each run of transaction MB5B returns different results for the
same combination of "material + plant".
More Terms
MB5B, RM07MLBD, runtime, performance, short dump
Cause and Prerequisites
The DBIF_RSQL_INVALID_RSQL runtime error may occur if you enter too many
individual material numbers in the selection screen for the database
selection.
The runtime is long because of the way report RM07MLBD works. It reads the
stocks and values from the material masters first, then the MM documents
and, in "Valuated Stock" mode, it then reads the respective FI documents.
If there are many MM and FI documents in the system, the runtimes can be
very long.
If goods movements are posted during the runtime of transaction MB5B for
materials that should also be processed by transaction MB5B, transaction
MB5B may return incorrect results.
Example: Transaction MB5B should process 100 materials with 10,000 MM
documents each. The system takes approximately 1 second to read the
material master data and it takes approximately 1 hour to read the MM and
FI documents. A goods movement for a material to be processed is posted
approximately 10 minutes after you start transaction MB5B. The stock for
this material before this posting has already been determined. The new MM
document is also read, however. The stock read before the posting is used
as the basis for calculating the stocks for the start and end date.
If you execute transaction MB5B during a time when no goods movements are
posted, these incorrect results do not occur.
Solution
The SAP standard release does not include a solution that allows you to
process mass data using transaction MB5B. The requirements for transaction
MB5B are very customer-specific. To allow for these customer-specific
requirements, we provide the following proposed implementation:
Implementation proposal:
o You should call transaction MB5B for only one "material + plant"
combination at a time.
o The list outputs for each of these runs are collected and at the
end of the processing they are prepared for a large list output.
You need three reports and one database table for this function. You can
store the lists in the INDX cluster table.
o Define work database table ZZ_MB5B with the following fields:
- Material number
- Plant
- Valuation area
- Key field for INDX cluster table
o The size category of the table should be based on the number of
entries in material valuation table MBEW.
Report ZZ_MB5B_PREPARE
In the first step, this report deletes all existing entries from the
ZZ_MB5B work table and the INDX cluster table from the last mass data
processing run of transaction MB5B.
o The ZZ_MB5B work table is filled in accordance with the selected
mode of transaction MB5B:
- Stock type mode = Valuated stock
- Include one entry in work table ZZ_MB5B for every "material +
valuation area" combination from table MBEW.
o Other modes:
- Include one entry in work table ZZ_MB5B for every "material +
plant" combination from table MARC
Furthermore, the new entries in work table ZZ_MB5B are assigned a unique
22-character string that later serves as a key term for cluster table INDX.
Report ZZ_MB5B_MONITOR
This report reads the entries sequentially in work table ZZ_MB5B. Depending
on the mode of transaction MB5B, a lock is executed as follows:
o Stock type mode = Valuated stock
For every "material + valuation area" combination, the system
determines all "material + plant" combinations. All determined
"material + plant" combinations are locked.
o Other modes:
- Every "material + plant" combination is locked.
- The entries from the ZZ_MB5B work table can be processed as
follows only if they have been locked successfully.
- Start report RM07MLBD for the current "Material + plant"
combination, or "material + valuation area" combination,
depending on the required mode.
- The list created is stored with the generated key term in the
INDX cluster table.
- The current entry is deleted from the ZZ_MB5B work table.
- Database updates are executed with COMMIT WORK AND WAIT.
- The lock is released.
- The system reads the next entry in the ZZ_MB5B work table.
Application
- The lock ensures that no goods movements can be posted during
the runtime of the RM07MLBD report for the "material + Plant"
combination to be processed.
- You can start several instances of this report at the same
time. This method ensures that all "material + plant"
combinations can be processed at the same time.
- The system takes just a few seconds to process a "material +
Plant" combination so there is just minimum disruption to
production operation.
- This report is started until there are no more entries in the
ZZ_MB5B work table.
- If the report terminates or is interrupted, it can be started
again at any time.
Report ZZ_MB5B_PRINT
You can use this report when all combinations of "material + plant", or
"material + valuation area" from the ZZ_MB5B work table have been
processed. The report reads the saved lists from the INDX cluster table and
adds these individual lists to a complete list output.
Estimated implementation effort
An experienced ABAP programmer requires an estimated three to five days to
create the ZZ_MB5B work table and these three reports. You can find a
similar program as an example in Note 32236: MBMSSQUA.
If you need support during the implementation, contact your SAP consultant.
Header Data
Release Status: Released for Customer
Released on: 05.12.2006 16:14:11
Priority: Recommendations/additional info
Category: Consulting
Main Component MM-IM-GF-REP IM Reporting (no LIS)
The note is not release-dependent.
Thanks in advance.
Edited by: Neliea on Jan 9, 2008 10:38 AM
Edited by: Neliea on Jan 9, 2008 10:39 AM

before you try any of this try working with database-hints as described in note 921165, 902157, 918992

Performance problem in RFC to JDBC interface

Hello everybody!
i'm working whit SAP PI 7.1
We defined some interfaces RFC - PI - JDBC (SQL server) but we have some performance problem.
If we have many row to write on the table then interface finish in timeout :
Synchronous timeout exceeded.
Returning to application. Exception: com.sap.engine.interfaces.messaging.api.exception.MessageExpiredException: Message 1d1f00b0-fecf-11de-8738-0015600446f0(OUTBOUND) expired.
I read the PI tuning document and i tried to apply configuration whit Advanced Adapter Engine but whitout result.
Now we want change the timeout in visual admin and maybe we solve the error but i'm asking myself....:
It's normal that for write 1500 row in a table we need more than 4 minuts????
It's possible accelerate this process??? After go live we will write messages whit more than 50.000 row.
somebody may help me?
PS: please no link to tuning guide or to notes (to increase the timeout parameter).

This could be because your Database system (JDBC server) is taking more time to insert. The problem is not on PI side but on the receiving system side. Try inserting the same number od rows on the database server itself and check for the time taken for execution. Adding indexes on your database table solves the issue lot of times.
Here PI is not the culprit but definitely the receiver system.
VJ

Performance problem

Hi, I'm having a performance problem I cannot solve, so I'm hoping anyone here has some advice.
Our system consists of a central database server, and many applications (on various servers) that connect to this database.
Most of these applications are older, legacy applications.
They use a special mechanism for concurrency that was designed, also a long time ago.
This mechanism requires the applications to lock a specific table with a TABLOCKX before making any changes to the database (in any table).
This is of course quite nasty as it essentially turns the database into single user mode, but we are planning to phase this mechanism out.
However, there is too much legacy code to simply migrate everything right away, so for the time being we're stuck with it.
Secondly, this central database may not become too big because the legacy applications cannot cope with large amounts of data.
So, a 'cleaning' mechanism was implemented to move older data from the central database to a 'history' database.
This cleaning mechanism was created in newer technology; C# .NET.
It is actually a CLR stored procedure that is called from a SQL job that runs every night on the history server.
But, even though it is new technology, the CLR proc *must* use the same lock as the legacy applications because they all depend on the correct use of this lock.
The cleaning functionality is not a primary process, so it does not have high priority.
This means that any other application should be able to interrupt the cleaning and get handled by SQL first.
Therefore, we designed the cleaning so that it cleans as few data as possible per transaction, so that any other process can get the lock right after committing each cleaning transaction.
On the other hand, this means that we do have a LOT of small transactions, and because each transaction is distributed, they are expensive and so it takes a long time for the cleaning to complete.
Now, the problem: when we start the cleaning process, we notice that the CPU shoots up to 100%, and other applications are slowed down excessively.
It even caused one of our customer's factories to shut down!
So, I'm wondering why the legacy applications cannot interrupt the cleaning.
Every cleaning transaction takes about 0.6 seconds, which may seem long for a single transaction, but this also means any other application should be able to interrupt within 0,6 seconds.
This is obviously not the case; it seems the cleaning session 'steals' all of the CPU, or for some reason other SQL sessions are not handled anymore, or at least with serious delays.
I was thinking about one of the following approaches to solve this problem:
1) Add waits within the CLR procedure, after each transaction. This should lower the CPU, but I have no idea whether this will allow the other applications to interrupt sooner. (And I really don't want the factory to shut down twice!)
2) Try to look within SQL Server (using DMV's or something) and see whether I can determine why the cleaning session gets more CPU. But I don't know whether this information is available, and I have no experience with DMV's.
So, to round up:
- The total cleaning process may take a long time, as long as it can be interrupted ASAP.
- The cleaning statements themselves are already as simple as possible so I don't think more query tuning is possible.
- I don't think it's possible to tell SQL Server that specific SQL statements have low priority.
Can anyone offer some advice on how to handle this?
Regards,
Stefan

Hi Stefan,
Have you solved this issue after follow up Bob's suggestion? I’m writing to follow up with you on this post, please let us know how things go.
If you have any feedback on our support, please click
here.
Elvis Long
TechNet Community Support

Server Performance problems

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