Mysqlcheck -r very slow on big tables

2004-08-13 Thread Konstantin Yotov
Hello! :)

mysqlcheck -r  is very slow when repair big tables
(over 4GB data - repair it 1h and 40m). Is there any
config option to fasten it.

Regards: Kosyo




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Mysql 3.23 and use index

2003-09-11 Thread Konstantin Yotov
Hello!

My Mysql version is 3.23.56.
I want to use specific index, but when I use "use
index" EXPLAIN gives me that key not used. And when
I'don use "use index" mysql uses other index.
Where I test this in 4.0.14 with force index it works
and  the query time is 4x faster with index I choose,
then the  index mysql use.

Is anybody can tell me how to fix this problem. May be
the way(sequence) of creating indexes has matter?

Thank you!

Kosyo

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Mysql 3.23 and use index

2003-09-11 Thread Konstantin Yotov
Hello!

My Mysql version is 3.23.56.
I want to use specific index, but when I use "use
index" EXPLAIN gives me that key not used. And when
I'don use "use index" mysql uses other index.
Where I test this in 4.0.14 with force index it works
and  the query time is 4x faster with index I choose,
then the  index mysql use.

Is anybody can tell me how to fix this problem. May be
the way(sequence) of creating indexes has matter?

Thank you!

Kosyo

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Mysql 3.23 and use index

2003-09-11 Thread Konstantin Yotov
Hello!

My Mysql version is 3.23.56.
I want to use specific index, but when I use "use
index" EXPLAIN gives me that key not used. And when
I'don use "use index" mysql uses other index.
Where I test this in 4.0.14 with force index it works
and  the query time is 4x faster with index I choose,
then the  index mysql use.

Is anybody can tell me how to fix this problem. May be
the way(sequence) of creating indexes has matter?

Thank you!

Kosyo

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Mysql - Dual Xeon or Dual Opteron

2003-07-07 Thread Konstantin Yotov
Hello! :)

Our server is very heavy loaded: 
CPUs states are in 0.0% idle almost all day.
Linux 7.3 running myslq 3.23.56 and apache 1.3.27 on 
2x1GHz Intel, 1GB RAM, 40GB WD 7200 8MB cache.
Mysql have around 166 threads and perforn over 400
Queries per second.
We are going to uprade our server but I'am wondering
between new Opteron (1.4GHz)and Xeon (2.4).
We are going to choose Dual Xeon solutions but after
reading article about Opteron and Xeon performance
with Mysql and Linux 
http://www.aceshardware.com/read.jsp?id=55000261,
where Opteron is 38% faster on query than Xeon, I am
very confused what to do.

If anybody can help with more information about this,
I would be very appriated.

Kosyo

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Problem with enum and cyrillic symbol 'ÿ'

2002-12-29 Thread Konstantin Yotov
Hello!

I tried to create table with field enum and if there
is cyrillic symbol "ÿ" query passes but when i start
describe table in others fields names apperes funny
characters. If I relplace "ÿ" with "ß" åverythin is
Ok.
Can anybody give me some advice in this strange
situation?
I'm using RedHat linux 7.3 with mysql 3.23.49 

Kosyo

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mysql and swap

2002-12-09 Thread Konstantin Yotov
Hello! :)

The problem is that after working 5-6 hours without
swapping Mysql begin to swap. If I switch off swap
with swapoff -a and then switch it on again after 5-6
horis withut swapping Mysql begin to swap again. Can
anybody give me some advice?
I'm using Apache with mod_perl enabled+mysql 
OS is Linux RedHat 7.3 kernel 2.4.18-3smp
2 CPU x 1GHz Intel 
1 GB RAM
SCSI Seagate HDD/with scsi controller which transfer
rate is 20MB/s !!! I still can persuade my boss to
change it/.

Thanks.
Bye

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undo command from mysql prompt

2002-07-22 Thread Konstantin Yotov





Hello! :)

Is there a way to undo query.
For example if execute from mysql prompt
update table set address='something';
and update all row is there a way to undo this action.
Thank you.

Kosyo

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undo command from mysql prompt

2002-07-22 Thread Konstantin Yotov

Hello! :)

Is there a way to undo query.
For example if execute from mysql prompt 
update table set address='something'; 
and update all row is there a way to undo this action.
Thank you.

Kosyo

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InnoDB or MyIsam?

2002-07-05 Thread Konstantin Yotov

Hello! :) 

I'm wondering which table type is better and why for
web project with about 100 000 customers. May be
InnoDB gives better query performance? I'm using now
MyIsam, but is this better idea to move to InnoDB? 

Thank you! :)

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How to select last record?

2002-06-03 Thread Konstantin Yotov

Hello! :)

Is there any chance to select last record in one sql
statement?
Thanks.

Kosyo

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Broken table

2002-05-22 Thread Konstantin Yotov

Hello! :)
One of my table suddunly stop working when I try to
execute SQL statement it'returns error msg:
Got error 127 from table handler
Is there a way to repair it. The information in this
table i very important for me.
Thank you.

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Mysql binary logs

2002-03-29 Thread Konstantin Yotov

Hello! :)

I want to ask about binary log - what kind of info it
writes and how I can use it. Is this info is connected
with  optimizing mysql work.
Thanks.

Kosyo

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Hello! Is there a way to find out bad queries? Also a way for verifing tables? Tnank you

2002-02-23 Thread Konstantin Yotov

Hello! 
Is there a way to find out bad query? Also a way for
verifing tables? 
Tnank you

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Re: release_lock

2002-02-12 Thread Konstantin Yotov

The problem is that mysql server restarts itself. I
read in mysql list that the possible reason is some
bad query. I understand that I can find it in the
mysqlbinlog. There is 3 queries in it and I repair
one, but others were from module Apache::Session. One
was this and looks OK but what is the reason to be in
mysql bin log?

Kosyo 

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release_lock

2002-02-12 Thread Konstantin Yotov

Hello there!

I'm using Apache-Session module and it seems that
everything work properly, but in bin log is this
query:

DO
RELEASE_LOCK("Apache-Session-0c47492fccde576b180ea37fa07de395");

What could be wrong in it?
Please help!

Kosyo

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release_lock

2002-02-11 Thread Konstantin Yotov

Hello there!

I'm using Apache-Session module and it seems that
everything work properly, but in bin log is this
query:

DO
RELEASE_LOCK("Apache-Session-0c47492fccde576b180ea37fa07de395");

What could be wrong in it?
Please help!

Kosyo

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MySql 3.23.29 on RedHat 6.2 restarts itself

2002-01-16 Thread Konstantin Yotov

Hello!

My MySql server on RedHat 6.2 restarts itself. In the
MySql log writes:
Number of processes running now: 0
020116 14:16:16  mysqld restarted
020116 14:16:17  Can't start server: Bind on TCP/IP
port: Address already in
020116 14:16:17  Do you already have another mysqld
server running on port:
020116 14:16:17  Aborting
 
020116 14:16:17  mysqld ended\n

Can somebody help me! It's urgent.
Is the problem in scripts. Do I need to upgrade mysql
version.
Thank you



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Help MySQL

2002-01-14 Thread Konstantin Yotov

Hello there!

I've site with 1000 hits per day. Scripts are written
in Perl and use MySQL database. MySQL server works
good, but sometimes suddenly crashes. Error log says:
Number of processes running now: 0
020113 02:50:41  mysqld restarted
020113  2:50:42  Can't start server: Bind on TCP/IP
port: Address already in
020113  2:50:42  Do you already have another mysqld
server running on port:
020113  2:50:42  Aborting
 
020113 02:50:42  mysqld ended\n

My OS is Linux RedHat 6.2
RAM 128MB
CPU Celeron 500Mhz

Please help!
Thank you in advance.

Kosyo


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