MySQL Variable size usage in shell prompt

2015-06-16 Thread Manivannan S
Hi,

When we are trying to restore the dump file, we got an error like  Got a 
packet bigger than max_allowed_packet. Then we increased max_allowed_packet 
variable size and passed along with MySQL restore command.

mysql -max_allowed_packet=128M -uusername -p  /path/file.sql

After increasing the variable size also we got same error. Later we converted 
the value from 128M to 134217728 Bytes, then restore done successfully.

In case my.cnf, when we pass the value for MySQL variables its accepting either 
in bytes, K, M or G.

Why it doesn't consider128M in MySQL prompt while restoring the dump file?

Regards
Manivannan S

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Performance Improvements with VIEW

2013-07-30 Thread Manivannan S.
Hi,

I've a table with 10 Million records in MySQL with INNODB engine. Using this 
table I am doing some calculations in STORED PROCEDURE and getting the results.

In Stored Procedure I used the base table and trying to process all the records 
in the table. But it's taking more than 15 Minutes to execute the procedure. 
When executing the Procedure in the process list I am getting 3 states like 
'Sending data', 'Sorting Result' and 'Sending data' again.

Then I created one view by using  the base table and updated the procedure by 
replacing that view in the place of a base table, it took only 4 minutes to 
execute the procedure with a view. When executing the Procedure in the process 
list I am getting 2 states like 'Sorting Result' and 'Sending data'. The first 
state of 'Sending data' is not happened with view, It's directly started with 
'Sorting Result' state.

When I'm referring some MySQL sites and other blogs, I have seen that VIEWS 
will never improve the performance. But here I see some improvements with a 
view.

I would like to know how VIEW is improving the performance.

Regards
Manivannan S


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Installation of MySQL in Redhat Linux 6.0

2012-07-05 Thread Manivannan S.
Hi all,

I am using Redhat Linux 6.0 (64 bit) machine, in this machine I 
am trying to install MySQL5.5 glibc23  server and client packages as a root 
user. While installing I am getting the following error:

ERROR 2002 (HY000): Can't connect to local MySQL server through socket 
'/var/lib/mysql/mysql.sock' (2)

When I try to install the MySQL rhel6 package then MySQL is 
installed and service also started successfully.

But I am not able to install the glibc23 package with SELinux is enabled in my 
Redhat linux machine. After Disabling the SELinux, I was able to install MySQL 
glibc23 package.

I want to know why MySQL glibc23 package is not able to install with SELinux 
enabled??

Thanks in advance.


Regards,
Manivannan S

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RE: NoSQL help

2012-06-14 Thread Manivannan S.
I tried with myisam engine also. But it also taking more time to generate the 
report. In my database I am having 8 innodb tables and at the same time I am 
joining 4 tables to get the report.

I am maintaining 60days records because the user will try to generate the 
report out of 60 days in terms of second, minute, hourly, weekly and Monthly 
report also.

From: Ananda Kumar [mailto:anan...@gmail.com]
Sent: Thursday, June 14, 2012 12:32 AM
To: Rick James
Cc: Johan De Meersman; Manivannan S.; mysql@lists.mysql.com
Subject: Re: NoSQL help

Did you try with myisam tables.
They are supposed to be good for reporting requirement
On Wed, Jun 13, 2012 at 11:52 PM, Rick James 
rja...@yahoo-inc.commailto:rja...@yahoo-inc.com wrote:
I'll second Johan's comments.

Count the disk hits!

One minor change:  Don't store averages in the summary table; instead store the 
SUM().  That lets you get the mathematically correct AVERAGE over any time 
range via
SUM(sum_foo) / SUM(count_foo)

Switching between MySQL and Mongo requires rewriting _all_ of the relevant code.

opinion NoSQL will be no better than MySQL for 150GB. /opinion  Count the 
disk hits!

I recently built a system that topped out at 350GB (90 days' data).  It 
involved hourly ingestion of a few GB of data and a variety of reports.  The 
prototype showed that most reports would take about an hour to run.  Not good.  
The final product, with summary tables, lets the reports be run on-demand and 
online and each takes only a few seconds.  By careful use of MEMORY tables, 
LOAD DATA, etc, the ingestion takes 5 minutes (each hour) for the raw data and 
2 minutes (total) for the 7 summary tables.  PARTITIONing was vital for the 
design.  Once an hour a new partition is populated; once a day, 24 hourly 
partitions are rolled into a new daily partition and the 90-day old partition 
is DROPped.


 -Original Message-
 From: Johan De Meersman [mailto:vegiv...@tuxera.bemailto:vegiv...@tuxera.be]
 Sent: Wednesday, June 13, 2012 6:20 AM
 To: Manivannan S.
 Cc: mysql@lists.mysql.commailto:mysql@lists.mysql.com
 Subject: Re: NoSQL help


 - Original Message -
  From: Manivannan S. 
  manivanna...@spanservices.commailto:manivanna...@spanservices.com
 
  Hi all,
 
  [lots of data]
  [slow reports]
  [wooo NoSQL magic]

 Not that I want to discourage you, but my standard first question is
 why do you think NoSQL (let alone any specific product) is the right
 solution? :-)

 Don't get me wrong, it might be; but from what little I now know about
 your environment, it sounds like applying some data warehousing
 techniques might suffice - and being the cynical dinosaur that I am, I
 have a healthy reluctance about welding new technology onto a stable
 environment.

 To speed up reporting (and note that these techniques are often applied
 even when implementing NoSQL solutions, too) it is usually a good first
 step to set up a process of data summarization.

 Basically, you pre-calculate averages, medians, groupings, whatever you
 need for your reports; and your job also saves the last record IDs it's
 processed; then on the next run, you only read the new records and
 update your summary tables to incorporate the new data.

 Suppose I have a table like this:

 ID | Val
 
  1 1
  2 7
  3 5
  413

 I want to report the average on a daily basis, and calculating that
 over those rows is unbearably slow because I'm running the process on a
 wristwatch from 1860 :-)

 So I get a summary table, calculate (1+7+5+13)/4 = 6.5 and that then
 gets a record saying this:

 Avg | elementCount | lastSeen
 -
 6.5  4  4

 Now, over the course of the day, the elements 4, 17 and 2 get added
 with sequential row numbers. Instead of calculating
 (1+7+5+13+4+17+2)/7, which would be slow; I can substitute the already
 summarized data by Avg*elementCount. Thus, I calculate (6.5*4 +
 4+17+2)/7 = 7, which is a lot faster, and my summary table now looks
 like this:

 Avg | elementCount | lastSeen
 -
   7  7  7

 This is of course a stupid example, but it saves you a lot of time if
 you already have the summary of several thousand elements and only need
 to update it for a handful. Similar tricks are possible for a lot of
 typical reporting stuff - you don't need to re-calculate data for past
 months over and over again, for instance - and that's what makes your
 reports run fast.


 Just my 2 cents :-)
 /johan

 --
 Bier met grenadyn
 Is als mosterd by den wyn
 Sy die't drinkt, is eene kwezel
 Hy die't drinkt, is ras een ezel

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RE: NoSQL help

2012-06-14 Thread Manivannan S.
id

select_type

table

type

possible_keys

key

key_len

ref

rows

Extra

1

SIMPLE

ibf

ALL

ibf_MsgId

\N

\N

\N

160944

1

SIMPLE

pl

ref

idx_unique_key_ib_msg\,index_message_id\,index_message_processing_status

idx_unique_key_ib_msg

180

reports.ibf.Message_Id\,const

1

Using where; Using index

1

SIMPLE

tl

ref

idx_unique_key_ib_text\,index_message_id

idx_unique_key_ib_text

153

reports.pl.Message_Id

1

1

SIMPLE

xl

ref

idx_unique_key_ib_xml\,index_message_id

idx_unique_key_ib_xml

153

reports.pl.Message_Id

1

Using where


This is the execution plan for 1.5 milion records..



From: Ananda Kumar [mailto:anan...@gmail.com]mailto:[mailto:anan...@gmail.com]
Sent: Thursday, June 14, 2012 3:33 PM
To: Manivannan S.
Cc: mysql@lists.mysql.commailto:mysql@lists.mysql.com
Subject: Re: NoSQL help

can u share the sql, explain plan, indexes etc,
show full processlist out put when the sql's are running
On Thu, Jun 14, 2012 at 3:03 PM, Manivannan S. 
manivanna...@spanservices.commailto:manivanna...@spanservices.com wrote:
I tried with myisam engine also. But it also taking more time to generate the 
report. In my database I am having 8 innodb tables and at the same time I am 
joining 4 tables to get the report.

I am maintaining 60days records because the user will try to generate the 
report out of 60 days in terms of second, minute, hourly, weekly and Monthly 
report also.

From: Ananda Kumar [mailto:anan...@gmail.commailto:anan...@gmail.com]
Sent: Thursday, June 14, 2012 12:32 AM
To: Rick James
Cc: Johan De Meersman; Manivannan S.; 
mysql@lists.mysql.commailto:mysql@lists.mysql.com
Subject: Re: NoSQL help

Did you try with myisam tables.
They are supposed to be good for reporting requirement
On Wed, Jun 13, 2012 at 11:52 PM, Rick James 
rja...@yahoo-inc.commailto:rja...@yahoo-inc.commailto:rja...@yahoo-inc.commailto:rja...@yahoo-inc.com
 wrote:
I'll second Johan's comments.

Count the disk hits!

One minor change:  Don't store averages in the summary table; instead store the 
SUM().  That lets you get the mathematically correct AVERAGE over any time 
range via
SUM(sum_foo) / SUM(count_foo)

Switching between MySQL and Mongo requires rewriting _all_ of the relevant code.

opinion NoSQL will be no better than MySQL for 150GB. /opinion  Count the 
disk hits!

I recently built a system that topped out at 350GB (90 days' data).  It 
involved hourly ingestion of a few GB of data and a variety of reports.  The 
prototype showed that most reports would take about an hour to run.  Not good.  
The final product, with summary tables, lets the reports be run on-demand and 
online and each takes only a few seconds.  By careful use of MEMORY tables, 
LOAD DATA, etc, the ingestion takes 5 minutes (each hour) for the raw data and 
2 minutes (total) for the 7 summary tables.  PARTITIONing was vital for the 
design.  Once an hour a new partition is populated; once a day, 24 hourly 
partitions are rolled into a new daily partition and the 90-day old partition 
is DROPped.


 -Original Message-
 From: Johan De Meersman 
 [mailto:vegiv...@tuxera.bemailto:vegiv...@tuxera.bemailto:vegiv...@tuxera.bemailto:vegiv...@tuxera.be]
 Sent: Wednesday, June 13, 2012 6:20 AM
 To: Manivannan S.
 Cc: 
 mysql@lists.mysql.commailto:mysql@lists.mysql.commailto:mysql@lists.mysql.commailto:mysql@lists.mysql.com
 Subject: Re: NoSQL help


 - Original Message -
  From: Manivannan S. 
  manivanna...@spanservices.commailto:manivanna...@spanservices.commailto:manivanna...@spanservices.commailto:manivanna...@spanservices.com
 
  Hi all,
 
  [lots of data]
  [slow reports]
  [wooo NoSQL magic]

 Not that I want to discourage you, but my standard first question is
 why do you think NoSQL (let alone any specific product) is the right
 solution? :-)

 Don't get me wrong, it might be; but from what little I now know about
 your environment, it sounds like applying some data warehousing
 techniques might suffice - and being the cynical dinosaur that I am, I
 have a healthy reluctance about welding new technology onto a stable
 environment.

 To speed up reporting (and note that these techniques are often applied
 even when implementing NoSQL solutions, too) it is usually a good first
 step to set up a process of data summarization.

 Basically, you pre-calculate averages, medians, groupings, whatever you
 need for your reports; and your job also saves the last record IDs it's
 processed; then on the next run, you only read the new records and
 update your summary tables to incorporate the new data.

 Suppose I have a table like this:

 ID | Val
 
  1 1
  2 7
  3 5
  413

 I want to report the average on a daily basis, and calculating that
 over those rows is unbearably slow because I'm running the process on a
 wristwatch from 1860 :-)

 So I get a summary table, calculate (1+7+5+13)/4 = 6.5 and that then
 gets a record saying this:

 Avg | elementCount | lastSeen

RE: NoSQL help

2012-06-14 Thread Manivannan S.
id

select_type

table

type

possible_keys

key

key_len

ref

rows

Extra

1

SIMPLE

ibf

ALL

ibf_MsgId

\N

\N

\N

160944

1

SIMPLE

pl

ref

idx_unique_key_ib_msg\,index_message_id\,index_message_processing_status

idx_unique_key_ib_msg

180

reports.ibf.Message_Id\,const

1

Using where; Using index

1

SIMPLE

tl

ref

idx_unique_key_ib_text\,index_message_id

idx_unique_key_ib_text

153

reports.pl.Message_Id

1

1

SIMPLE

xl

ref

idx_unique_key_ib_xml\,index_message_id

idx_unique_key_ib_xml

153

reports.pl.Message_Id

1

Using where


Sorry for the previous mail. this is my execution plan for 1.5 million 
records

From: Ananda Kumar [mailto:anan...@gmail.com]
Sent: Thursday, June 14, 2012 3:33 PM
To: Manivannan S.
Cc: mysql@lists.mysql.com
Subject: Re: NoSQL help

can u share the sql, explain plan, indexes etc,
show full processlist out put when the sql's are running
On Thu, Jun 14, 2012 at 3:03 PM, Manivannan S. 
manivanna...@spanservices.commailto:manivanna...@spanservices.com wrote:
I tried with myisam engine also. But it also taking more time to generate the 
report. In my database I am having 8 innodb tables and at the same time I am 
joining 4 tables to get the report.

I am maintaining 60days records because the user will try to generate the 
report out of 60 days in terms of second, minute, hourly, weekly and Monthly 
report also.

From: Ananda Kumar [mailto:anan...@gmail.commailto:anan...@gmail.com]
Sent: Thursday, June 14, 2012 12:32 AM
To: Rick James
Cc: Johan De Meersman; Manivannan S.; 
mysql@lists.mysql.commailto:mysql@lists.mysql.com
Subject: Re: NoSQL help

Did you try with myisam tables.
They are supposed to be good for reporting requirement
On Wed, Jun 13, 2012 at 11:52 PM, Rick James 
rja...@yahoo-inc.commailto:rja...@yahoo-inc.commailto:rja...@yahoo-inc.commailto:rja...@yahoo-inc.com
 wrote:
I'll second Johan's comments.

Count the disk hits!

One minor change:  Don't store averages in the summary table; instead store the 
SUM().  That lets you get the mathematically correct AVERAGE over any time 
range via
SUM(sum_foo) / SUM(count_foo)

Switching between MySQL and Mongo requires rewriting _all_ of the relevant code.

opinion NoSQL will be no better than MySQL for 150GB. /opinion  Count the 
disk hits!

I recently built a system that topped out at 350GB (90 days' data).  It 
involved hourly ingestion of a few GB of data and a variety of reports.  The 
prototype showed that most reports would take about an hour to run.  Not good.  
The final product, with summary tables, lets the reports be run on-demand and 
online and each takes only a few seconds.  By careful use of MEMORY tables, 
LOAD DATA, etc, the ingestion takes 5 minutes (each hour) for the raw data and 
2 minutes (total) for the 7 summary tables.  PARTITIONing was vital for the 
design.  Once an hour a new partition is populated; once a day, 24 hourly 
partitions are rolled into a new daily partition and the 90-day old partition 
is DROPped.


 -Original Message-
 From: Johan De Meersman 
 [mailto:vegiv...@tuxera.bemailto:vegiv...@tuxera.bemailto:vegiv...@tuxera.bemailto:vegiv...@tuxera.be]
 Sent: Wednesday, June 13, 2012 6:20 AM
 To: Manivannan S.
 Cc: 
 mysql@lists.mysql.commailto:mysql@lists.mysql.commailto:mysql@lists.mysql.commailto:mysql@lists.mysql.com
 Subject: Re: NoSQL help


 - Original Message -
  From: Manivannan S. 
  manivanna...@spanservices.commailto:manivanna...@spanservices.commailto:manivanna...@spanservices.commailto:manivanna...@spanservices.com
 
  Hi all,
 
  [lots of data]
  [slow reports]
  [wooo NoSQL magic]

 Not that I want to discourage you, but my standard first question is
 why do you think NoSQL (let alone any specific product) is the right
 solution? :-)

 Don't get me wrong, it might be; but from what little I now know about
 your environment, it sounds like applying some data warehousing
 techniques might suffice - and being the cynical dinosaur that I am, I
 have a healthy reluctance about welding new technology onto a stable
 environment.

 To speed up reporting (and note that these techniques are often applied
 even when implementing NoSQL solutions, too) it is usually a good first
 step to set up a process of data summarization.

 Basically, you pre-calculate averages, medians, groupings, whatever you
 need for your reports; and your job also saves the last record IDs it's
 processed; then on the next run, you only read the new records and
 update your summary tables to incorporate the new data.

 Suppose I have a table like this:

 ID | Val
 
  1 1
  2 7
  3 5
  413

 I want to report the average on a daily basis, and calculating that
 over those rows is unbearably slow because I'm running the process on a
 wristwatch from 1860 :-)

 So I get a summary table, calculate (1+7+5+13)/4 = 6.5 and that then
 gets a record saying this:

 Avg | elementCount | lastSeen
 -
 6.5  4  4

NoSQL help

2012-06-13 Thread Manivannan S.
Hi all,

I am using MySQL 5.1, in this I am inserting 5GB of data for 
two days into my database. I am trying to generate a report by processing these 
data which are available in my database. Our clients are planning to keep the 
records for 60 days then that will cross 150GB of data. To generate a report I 
have to use all this accumulated of 150 GB data. I have done all kind of 
optimizations in my procedure and  I have tuned up my MySQL server parameters 
also. But using MySQL getting the reports for this amount of data, within the 
short time is not possible.

I have seen the concept of NoSQL and I am planning to implement 
this NoSQL concept into my database.

Does anyone have any idea in NoSQL especially MongoDB 
technology and how to use this ?

Thanks in advance.

Regards,
Manivannan S

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Reducing ibdata1 file size

2012-05-21 Thread Manivannan S.
Hi ,

I am trying to reduce the ibdata1 data file in MySQL. In MySQL 
data directory the ibdata1 data file is always increasing whenever I am 
creating a new database and inserting some data into database. If I drop the 
existing database, the table structures only dropped from the server but data 
still exist in the ibdata1 data file.

How to reduce the ibdata1 file size in both LINUX and WINDOWS machine.

Do you have any idea how to solve this problem. Thanks for any feedback.



Thanks
Manivannan S

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RE: Error in starting MySQL service on LINUX

2012-04-05 Thread Manivannan S.
Hi,

If I execute service myqsld start its saying 

mysqld: unrecognized service

-Original Message-
From: Reindl Harald [mailto:h.rei...@thelounge.net] 
Sent: Thursday, April 05, 2012 4:05 PM
To: mysql@lists.mysql.com
Subject: Re: Error in starting MySQL service on LINUX



Am 05.04.2012 12:27, schrieb Manivannan S.:
 Hi,
 
 In 64-bit Linux(Centos/Red Hat) machine when I am 
 trying to start the MySQL service by using service mysql start command 
 , I am getting the following error

 
 I have installed
 
 MySQL-client-5.1.52-1.glibc23.x86_64.rpm
 MySQL-server-5.1.52-1.glibc23.x86_64.rpm
 
 In my Linux machine

why do you not use yum install mysql-server and the packages of your 
distribution instead install random binaries

service myqsld start is using the init-scripts of the distribution


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Error in starting MySQL service on LINUX

2012-04-05 Thread Manivannan S.
Hi,

In 64-bit Linux(Centos/Red Hat) machine when I am trying to 
start the MySQL service by using service mysql start command , I am getting the 
following error



Ø  Starting MySQL.Manager of pid-file quit without updating file [FAILED]



If I try to stop the MySQL service I am getting this error



Ø  MySQL manager or server PID file could not be found!   [FAILED]



When I try to start MySQL service from /etc/init.d/mysql start



Ø  ERROR 2002 (HY000): Can't connect to local MySQL server through socket 
'/var/lib/mysql/mysql.sock' (111)



I have installed

MySQL-client-5.1.52-1.glibc23.x86_64.rpm

MySQL-server-5.1.52-1.glibc23.x86_64.rpm

In my Linux machine.



Does anyone know how to solve this issue in MySQL?


Thanks
Manivannan S

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RE: Error in starting MySQL service on LINUX

2012-04-05 Thread Manivannan S.
I am not using random binaries. I am using rpm packages only which are already 
tested and preconfigured. By installing rpm package also I am facing the same 
issue.



-Original Message-
From: Reindl Harald [mailto:h.rei...@thelounge.net] 
Sent: Thursday, April 05, 2012 4:12 PM
Cc: mysql@lists.mysql.com
Subject: Re: Error in starting MySQL service on LINUX

boah do not top-post!

this was a typo - seems you did not understand my question WHY are you 
downloading random binaries instead using packages from your linux distribution 
which are tested and preconfigured?

Am 05.04.2012 12:39, schrieb Manivannan S.:
 Hi,
 
   If I execute service myqsld start its saying
   
   mysqld: unrecognized service

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RE: Error in starting MySQL service on LINUX

2012-04-05 Thread Manivannan S.

I am not facing the MySQL server problem during installation. I have 
installed those two rpm packages in my machine successfully and started working 
in mysql.

I am trying to the change parameter value in my.cnf file to tune up the 
server for performance improvements. For that I stopped MySQL server and try to 
restart the MySQL service from that moment onwards I am getting this kind of 
errors like

Starting MySQL.Manager of pid-file quit without updating file [FAILED] 
MySQL manager or server PID file could not be found!   [FAILED]
ERROR 2002 (HY000): Can't connect to local MySQL server through socket 
'/var/lib/mysql/mysql.sock' (111)

I can't go with any other installable packages by keeping the same 
package I have to solve this issue. Please give some ideas to resolve this 
problem.

-Original Message-
From: lists-mysql [mailto:replies-lists-b3z1-my...@listmail.innovate.net] 
Sent: Thursday, April 05, 2012 5:28 PM
To: Manivannan S.
Subject: RE: Error in starting MySQL service on LINUX



 Original Message 
 Date: Thursday, April 05, 2012 11:04:48 AM +
 From: Manivannan S. manivanna...@spanservices.com
 To: mysql@lists.mysql.com
 Subject: RE: Error in starting MySQL service on LINUX

 I am not using random binaries. I am using rpm packages only which are 
 already tested and preconfigured. By installing rpm package also I am 
 facing the same issue.
 

I'm not certain where you got the packages you installed:

   MySQL-client-5.1.52-1.glibc23.x86_64.rpm 
   MySQL-server-5.1.52-1.glibc23.x86_64.rpm 

but they are not from the rhel/centos repos. If you install packages from the 
appropriate repos it will take care of setting up the startup scripts, etc. for 
your environment. If you install packages/rpm files from some other location 
you'll need to do the configuration and setup yourself, as is your current 
situation.

I would suggest removing the above and doing a yum install. The current 
packages in the rhel-6/centos-6 context are:

  mysql-5.1.61-1.el6_2.1.x86_64
  mysql-server-5.1.61-1.el6_2.1.x86_64

If, for some reason, you want to stick with what you've installed then you'll 
need to work on doing the setup/configuration manually.


   - Richard



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