MySQL performance tuning
I am conducting some research as to the effects of my.cnf tuning to the performance of MySQL under OS X.
To my surprise, I've found this subject quite undocumented on the internet, so I would like some info about which variables have the greatest impact.
I have already encountered the article concerning skip-thread-priority, and have included it in the testing file, but I'm wondering if there's any database experts who have found other values that seem to boost it that little bit more.
Also, I would like to know if there's any difference between OS X Client and OS X Server on this matter, and if so, whether this is documented anywhere.
17" Core 2 Duo Macbook Pro Mac OS X (10.4.8)
No one can tell you how to tune your database because there are too many variables that are specific to your installation.
Some of the major factors hinge on the size of your database tables, both in terms of number of rows and the type of data within them. Then there's questions of whether you're using InnoDB or MyISAM, the cacheability of the data, the ratio of reads to writes, the size of each record, etc., etc., etc.
Tuning paramaters for a 4 TB database with 20,000,000 rows are going to be radically different than those for a 100MB database with 10,000 rows.
Then, of course, there are factors that aren't in my.cnf anyway - things like table indexes, data formats, query structure, etc.
The same query can take radically different amounts of time depending on the indexes on the table. Conversely, much (most?) performance tuning comes down to query optimization rather than database configuration - reordering the parameters in a query can have dramatic effects on performance, depending on the database structure.
So, you see, you're not likely to find a magic bullet that says 'make sure you add the gofaster=1 parameter to your my.cnf'. Database Administrators make a living with this stuff and every situation is different.
Similar Messages
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MySQL InnoDB performance tuning
Hi,
We recently updated our Solaris 10 (Sparc) patch level. It is from:
Solaris 10 8/07 s10s_u4wos_12b SPARC
Patch level 137111-05
to
Solaris 10 10/09 s10s_u8wos_08a SPARC
Patch level 144488-14
We have two functions in MySQL uses InnoDB. In the old version of Solaris 10 (8/07), one function takes less than 1 sec to finish execute.
However in the newer version of Solaris 10 (10/09). It takes about 40 secs to finish execute.
So, we found one solution in google that said to change the innodb_flush_log_at_trx_commit to 0 instead of default 1, then the function take only about 0.41 sec to finish execute.
So does anyone know what did the newer version of Solaris (update 8) has changed that I need to change this innodb_flush_log_at_commit to make better performance b/c the older version of Solaris the mysql innodb_flush_log_at_trx_commit still 1 and peformance is less than 1 secs.
Thanks!No one can tell you how to tune your database because there are too many variables that are specific to your installation.
Some of the major factors hinge on the size of your database tables, both in terms of number of rows and the type of data within them. Then there's questions of whether you're using InnoDB or MyISAM, the cacheability of the data, the ratio of reads to writes, the size of each record, etc., etc., etc.
Tuning paramaters for a 4 TB database with 20,000,000 rows are going to be radically different than those for a 100MB database with 10,000 rows.
Then, of course, there are factors that aren't in my.cnf anyway - things like table indexes, data formats, query structure, etc.
The same query can take radically different amounts of time depending on the indexes on the table. Conversely, much (most?) performance tuning comes down to query optimization rather than database configuration - reordering the parameters in a query can have dramatic effects on performance, depending on the database structure.
So, you see, you're not likely to find a magic bullet that says 'make sure you add the gofaster=1 parameter to your my.cnf'. Database Administrators make a living with this stuff and every situation is different. -
I moved our internal application from a P3 500mhz CPU 1U
server to a Duo-Core Xeon 1.6ghz server.
The newer box has a larger HD, more RAM, beefier CPU, yet my
application is running at the same or a smidgen faster than the old
server. Oh, I went from a Win2k, IIS 5.0 box to a Windows Server
2003 running IIS 6, mysql 5.0.
I did a Windows Performance Monitor look-see. I added all the
CF services and watched the graphs do their thing. I noticed that
after I ran query on my application, the jrun service Avg. Req Time
is pinned at 100%. Even several minutes after inactivity on the
box, this process is still at 100%. Anyone know if this is a
causing my performance woes? Anyone know what else I can look at to
increase the speed of the app (barring and serious code rebuild)?
Thanks!
chrisAnyone know what else I can look at to increase the speed of
the app
(barring and serious code rebuild)?
There are some tweaks and tips, but I will let more knowledge
folks
speak to these. But I am afraid you problem maybe a code
issue. From
the brief description I would be concerned there is some kind
of memory
leak thing happening in your code and until you track it down
and plug
it up, no amount of memory or performance tuning is going to
do you much
good. -
Report running for long time & performance tuning
Hi All,
(1). WebI report is running for long time.so what are the steps i need to check for it ?
(2). Can you tell me about performance tuning in BO ?
please help me.....
Thanks
Kumar(1). WebI report is running for long time.so what are the steps i need to check for it ?
The first step is to see if the problem lies in the query on the data source or in webi itself. Depending on the data source there are different ways to extract the query and try to run it against the database. Which source does your report uses?
(2). Can you tell me about performance tuning in BO ?
I would recommend to start by reading the administrator's guide. There is a section about how to improve performance.
Regards,
Stratos -
Oracle 11g Performance tuning approach ?
Hello Experts,
Is it the right forum to follow oracle performance tuning discussions ? If not, let me know what will be the forum to pick up some thread on this subject.
I am looking for performance tuning approach for oracle 11g. I learned there are some new items in 11g in this regard. For persons, who did tuning in earlier versions of Oracle,
what will be the best way adopt to 11 g?
I reviewed the 11g performance tuning guide, but I am looking for some white papers/blogs with case studies and practical approaches. I hope that you have used them.
What are the other sources to pick up some discussions?
Do you mind, share your thoughts?
Thanks in advance.
RIThe best sources of information on performance tuning are:
1. Jonathan Lewis: http://jonathanlewis.wordpress.com/all-postings/
2. Christian Antognini: http://www.antognini.ch/
3. Tanel Poder: http://blog.tanelpoder.com/
4. Richard Foote: http://richardfoote.wordpress.com/
5. Cary Millsap: http://carymillsap.blogspot.com/
and a few dozen others whose blogs you will find cross-referenced in those above. -
Performance tuning of BPEL processes in SOA Suite 11g
Hi,
We are working with a customer for performance tuning of SOA Suite 11g, one of the areas is to tune the BPEL processes. I am new to this and started out with stress testing Hello World process using SOAPUI tool. I would like help with the below topics -
1. How do I interpret the statistics collected during stress testing? Do we have any benchmark set that can indicate that the performance is ok.
2. Do we need to run stress tests for every BPEL process deployed?
2. Is there any performance tuning strategy documentation available? Or can anybody share his/her experiences to guide me?
Thanks in advance!
Sritama1. How do I interpret the statistics collected during stress testing? Do we have any benchmark set that can indicate that the performance is ok.
You need
pay attention to:
java heap usage vs java heap capacity
java eden usage vs java eden capacity
JDBC pool initial connections vs JDBC pool capacity connections
if you are using linux: top
if you are using aix: topas
2. Do we need to run stress tests for every BPEL process deployed?
yes, you need test each BPEL. You can use "Jmeter" tool.
Download Jmeter from here: Apache JMeter - Apache JMeter™
Other tools:
jstat
jstack
jps -v
Enterprise Manager
WebLogic Console
VisualVM
JRockit Mission Control
3. Is there any performance tuning strategy documentation available? Or can anybody share his/her experiences to guide me?
I recommend "Oracle SOA Suite 11g Performance Tuning Cookbook" http://www.amazon.com/Oracle-Suite-Performance-Tuning-Cookbook/dp/1849688842/ref=sr_1_1?ie=UTF8&qid=1378482031&sr=8-1&keywords=oracle+soa+suite+11g+performance+tuning+cookbook -
Performance tuning related issues
hi experts
i am new to performance tuning application. can any one share some stuff(bw3.5& bi7)related to the concern area.send any relavent docs to my id: [email protected] .
thanks in advance
regards
gavaskar
[email protected]hi Gavaskar,
check this, you can download lot of performance materials
Business Intelligence Performance Tuning [original link is broken]
and e-learning -> intermediate course and advance course
https://www.sdn.sap.com/irj/sdn/developerareas/bi?rid=/webcontent/uuid/fe5b0b5e-0501-0010-cd88-c871915ec3bf [original link is broken]
e.g
https://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/docs/media/uuid/10b589ad-0701-0010-0299-e5c282b7aaad
https://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/docs/media/uuid/d9fd84ad-0701-0010-d9a5-ba726caa585d
https://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/docs/media/uuid/8e6183ad-0701-0010-e083-9ab1c6afe6f2
performance tools in bw 3.5
https://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/docs/media/uuid/07a4f070-0701-0010-3b91-a6bf7644c98f
(here also you can download the presentation by righ click the disk drive icon)
hope this helps. -
[ADF-11.1.2] Proof of view performance tuning in oracle adf
Hello,
Take an example of : http://www.gebs.ro/blog/oracle/adf-view-object-performance-tuning-analysis/
It tells me perfectly how to tune VO to achieve performance, but how to see it working ?
For example: I Set Fetch size of 25, 'in Batch of' set to 1 or 26 I see following SQL Statement in Log
[1028] SELECT Company.COMPANY_ID, Company.CREATED_DATE, Company.CREATED_BY, Company.LAST_MODIFY_DATE, Company.LAST_MODIFY_BY, Company.NAME FROM COMPANY Companyas if it is fetching all the records from table at a time no matter what's the size of Batch. If I am seeing 50 records on UI at a time, then I would expect at least 2 SELECT statement fetching 26 records by each statement if I set Batch Size to 26... OR at least 50 SELECT statement for Batch size set to '1'.
Please tell me how to see view performance tuning working ? How one can say that setting batch size = '1' is bad for performance?Anandsagar,
why don't you just read up on http://download.oracle.com/docs/cd/E21764_01/core.1111/e10108/adf.htm#CIHHGADG
there are more factors influencing performance than just query. Btw, indexing your queries also helps to tune performance
Frank -
Performance tuning in PL/SQL code
Hi,
I am working on already existing PL/SQL code which is written by someone else on validation and conversion of data from a temporary table to base table. It usually has 3.5 million rows. and the procedure takes arount 2.5 - 3 hrs to complete.
Can I enhance the PL/SQL code for better performance ? or, is this OK to take so long to process these many rows?
Thanks!
YoginiCan I enhance the PL/SQL code for better performance ? Probably you can enhance it.
or, is this OK to take so long to process these many rows? It should take a few minutes, not several hours.
But please provide some more details like your database version etc.
I suggest to TRACE the session that executes the PL/SQL code, with WAIT events, so you'll see where and on what time is spent, you'll identify your 'problem statements very quickly' (after you or your DBA have TKPROF'ed the trace file).
SQL> alter session set events '10046 trace name context forever, level 12';
SQL> execute your PL/SQL code here
SQL> exitWill give you a .trc file in your udump directory on the server.
http://www.oracle-base.com/articles/10g/SQLTrace10046TrcsessAndTkprof10g.php
Also this informative thread can give you more ideas:
HOW TO: Post a SQL statement tuning request - template posting
as well as doing a search on 10046 at AskTom, http://asktom.oracle.com will give you more examples.
and reading Oracle's Performance Tuning Guide: http://www.oracle.com/pls/db102/to_toc?pathname=server.102%2Fb14211%2Ftoc.htm&remark=portal+%28Getting+Started%29 -
hi,
I have to do perofrmance for one program, it is taking 67000 secs in back ground for execution and 1000 secs for some varints .It is an ALV report.
please suggest me how to proced to change the code.Performance tuning for Data Selection Statement
<b>http://www.sap-img.com/abap/performance-tuning-for-data-selection-statement.htm</b>Debugger
http://help.sap.com/saphelp_47x200/helpdata/en/c6/617ca9e68c11d2b2ab080009b43351/content.htm
http://www.cba.nau.edu/haney-j/CIS497/Assignments/Debugging.doc
http://help.sap.com/saphelp_erp2005/helpdata/en/b3/d322540c3beb4ba53795784eebb680/frameset.htm
Run Time Analyser
http://help.sap.com/saphelp_47x200/helpdata/en/c6/617cafe68c11d2b2ab080009b43351/content.htm
SQL trace
http://help.sap.com/saphelp_47x200/helpdata/en/d1/801f7c454211d189710000e8322d00/content.htm
CATT - Computer Aided Testing Too
http://help.sap.com/saphelp_47x200/helpdata/en/b3/410b37233f7c6fe10000009b38f936/frameset.htm
Test Workbench
http://help.sap.com/saphelp_47x200/helpdata/en/a8/157235d0fa8742e10000009b38f889/frameset.htm
Coverage Analyser
http://help.sap.com/saphelp_47x200/helpdata/en/c7/af9a79061a11d4b3d4080009b43351/content.htm
Runtime Monitor
http://help.sap.com/saphelp_47x200/helpdata/en/b5/fa121cc15911d5993d00508b6b8b11/content.htm
Memory Inspector
http://help.sap.com/saphelp_47x200/helpdata/en/a2/e5fc84cc87964cb2c29f584152d74e/content.htm
ECATT - Extended Computer Aided testing tool.
http://help.sap.com/saphelp_47x200/helpdata/en/20/e81c3b84e65e7be10000000a11402f/frameset.htm
Just refer to these links...
performance
Performance
Performance Guide
performance issues...
Performance Tuning
Performance issues
performance tuning
performance tuning
You can go to the transaction SE30 to have the runtime analysis of your program.Also try the transaction SCI , which is SAP Code Inspector. -
Performance tuning in CRM server
Hi everyone,
My CRM server working very slow. Idont know the exact reason. My server configuration IBM Xeon processor 3 Ghz 3GB RAM.There are about 25 users. Is this problem with SAP or Hardware.If any one have performance tuning document plz post it.
Thanks,
MuraliChech the following:-
Processor usage
Ram usage
background jobs
how many user at a time
what kind of job they do
Any Network Problem
Increse Work Processor
increase Virtual Ram
And for 25 users, You need System with 2 CPU and 4 Gb Ram
Regards -
Performance tuning in XI, (SAP Note 857530 )
Could any one pls tell me where to find sap notes.
I am looking for "SAP Note 857530 "
Integration process performance(in sap XI).
or how can I view the performance of the integration process ? or exactly how performance tuning is done.
pls help,
Best regards,
verma.Hi,
SAP Note:
Symptom
Performance bottlenecks when executing integration processes.
Other terms
ccBPM
BPE
Performance
Integration Processes
Solution
This note refers to all notes that are concerned with improving the performance of the ccBPM runtime.
This note will be continually updated as improvements are made.
Also read the document "Checklist: Making Correct Use of Integration Processes" in the SAP Library documentation, on SAP Service Marketplace, and in SDN; it contains information about performance issues to bear in mind when you model integration processes.
Refer to the appended notes and maintain the default code changes by using SNOTE, or by importing the relevant service packs. Note that some performance improvements cannot be implemented by using SNOTE and are instead only available in service packs.
Regards
vijaya -
Performance Tuning in JDev11.1.14
Hi Experts,
Any docs to describe how to improve the performance tuning of the ADF (across the layer) application.
JDev 11.1.1.4g
thnkshttp://download.oracle.com/docs/cd/E16764_01/core.1111/e10108/toc.htm
-
Performance tuning in oracle 10g
Hi Guys
i hope all are well,Have a nice day Today
i have discuss with some performance tuning issue
recently , i joined the new project that project improve the efficiency of the applicaton. in this environment oracle plsql langauage are used , so if i need to improve effiency of application what are the step are taken
and what are the way to go through the process improvement
kindly help megenerate statspack/AWR reports
HOW To Make TUNING request
https://forums.oracle.com/forums/thread.jspa?threadID=2174552#9360003 -
Performance tuning in EP6 SP14
Hi,
We just migrated our development EP5 SP6 portal to NW04 EP6 SP14 and are seeing some performance problems with a limited number of users (about 3).
Please point me to some good clear documentation related to performance tuning. Better yet, please tell me some things you have done in your EP6 portal to improve performance.
Any help is greatly appreciated.
Regards,
RickHi
In general we have experienced that NW04 is faster than earlier versions.
One of the big questions is if the response time is SERVER time (used for processing on the J2EE server), NETWORK time (latency and many roundtrips), CLIENT time (rendering, virus-scanning etc) or a combination.
1) Is the capacity on the server ok? CPU utilization and queue lenght high? Memory swapping?
2) A quick optimazation server-side is logging: Plese verify that that log and trace levels are ERROR /FATAL or NONE on J2EE and also avoid logging on IIS and IIS proxy is used
3) Using a HTTP trace you can see if the NW portal for some reason generetes more roundtrips (more GETS) that the old portal for the same content - what is the network latency? Try to do a "ping <server>" from a client pc and see the time (latency) - if it is below 20 ms the network should do a big difference.
4) On the client try to call the portal with anti-virus de-activated if the delta/difference in response times are HUGE your client could be to old? (don't underestimate the client). Maybee the compression should be set different to avoid compres (server) and uncompres (client) - this is a tradeoff with network latency however.
Also client-side caching (in browser) is important.
These are just QUICK point to consider - tuning is complex
BR
Tom Bo
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