Have you tried to use a non SMP kernel ? I have also experienced table corruptions 2 years ago with mysql 3.23.xx and a 2.2.14smp kernel. I had several servers with the same configuration but only the most loaded had this problem. I had no more corruptions in single CPU mode. I upgraded later to a newer smp kernel (2.4) that solved the problem.
It may be a temporary fix until you schedule an upgrade.
Hope this helps Joseph Bueno
Tom Roos wrote:
hi guys
i am runing the rh 2.4.20-18.7smp kernel with mysql 4.0.13 and i sometimes experience problems with table corruptions when volumes become high.
i'm trying different parameters for mysqld to see if the problem goes away.
tom
-----Original Message----- From: Richard Gabriel [mailto:[EMAIL PROTECTED] Sent: 15 July 2003 22:35 To: Heikki Tuuri; [EMAIL PROTECTED] Subject: Re: Frequent Table Corruption - Please Help
Thank you very much for the help. I will schedule the upgrade and see if helps. I have 2 other machines running 2.4.18 without problems, but they also do not run the volume that the problematic machine has and they do not have RAID. Take care.
Richard Gabriel Director of Technology, CoreSense Inc. (518) 306-3043 x3951
----- Original Message ----- From: "Heikki Tuuri" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Tuesday, July 15, 2003 4:08 PM
Subject: Re: Frequent Table Corruption - Please Help
Richard,
----- Original Message ----- From: "Richard Gabriel" <[EMAIL PROTECTED]>
To: "Heikki Tuuri" <[EMAIL PROTECTED]>; <[EMAIL PROTECTED]>
Sent: Tuesday, July 15, 2003 10:53 PM
Subject: Re: Frequent Table Corruption - Please Help
Thanks for the tip. I'll see about upgrading, but it won't be a small
task.
Any reason why 2.4.18 problems wouldn't have effected MySQL 3.23? I'm trying to search for a solution that does not involve upgrading kernels
on
20 machines that are in production use right now. Thanks again!
it may be worthwhile to test a new kernel in one of those problematic computers.
We believe corruption problems in RH 2.4.18/drivers are random. Then any small change can provoke them. But we will probably never know what
exactly
was wrong in some 2.4.18 computers.
Richard Gabriel Director of Technology, CoreSense Inc. (518) 306-3043 x3951
Regards,
Heikki
----- Original Message ----- From: "Heikki Tuuri" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Tuesday, July 15, 2003 3:45 PM
Subject: Re: Frequent Table Corruption - Please Help
Richard,
you are running a Red Hat kernel 2.4.18? Kernels 2.4.20 seem to be
much
more
reliable.
Best regards,
Heikki Tuuri Innobase Oy http://www.innodb.com Transactions, foreign keys, and a hot backup tool for MySQL Order MySQL technical support from https://order.mysql.com/
----- Original Message ----- From: "Richard Gabriel" <[EMAIL PROTECTED]>
Newsgroups: mailing.database.mysql
Sent: Tuesday, July 15, 2003 9:52 PM
Subject: Frequent Table Corruption - Please Help
Hi everyone,
Since we upgraded to MySQL 4.0.13 from 3.23, we have been getting
table
corruption often. It happens about twice per week (with about 500 queries per second average). I have even set up a cron to run mysqlcheck every hour to try to do some damage control. The biggest problem is that once the table is corrupted, it seems to be locked. Well, no clients can read from it. Once repaired, just one record
is
usually lost for each time the corruption occurs. I am not sure if
this
is a MySQL bug or even how to reproduce it, but I was hoping that someone here could help. I have included all the information that I have about this below. Any insight is greatly appreciated!
Here is the mysqlbug information:
Release: mysql-4.0.13 (Official MySQL RPM)
C compiler: 2.95.3 C++ compiler: 2.95.3 Environment:
System: Linux *****.com 2.4.18-14smp #1 SMP Wed Sep 4 12:34:47 EDT
2002
i686 i686 i386 GNU/Linux Architecture: i686
Some paths: /usr/bin/perl /usr/bin/make /usr/bin/gmake /usr/bin/gcc /usr/bin/ccGCC: Reading specs from /usr/lib/gcc-lib/i386-redhat-linux/3.2/specs Configured with: ../configure --prefix=/usr --mandir=/usr/share/man --infodir=/usr/share/info --enable-shared --enable-threads=posix --disable-checking --host=i386-redhat-linux --with-system-zlib --enable-__cxa_atexit Thread model: posix gcc version 3.2 20020903 (Red Hat Linux 8.0 3.2-7) Compilation info: CC='gcc' CFLAGS='-O6 -fno-omit-frame-pointer -mpentium' CXX='g++' CXXFLAGS='-O6 -fno-omit-frame-pointer -felide-constructors -fno-exceptions -fno-rtti -mpentium'
LDFLAGS=''
ASFLAGS='' LIBC: lrwxrwxrwx 1 root root 14 Nov 1 2002
/lib/libc.so.6
-> libc-2.2.93.so -rwxr-xr-x 1 root root 1235468 Sep 5 2002 /lib/libc-2.2.93.so -rw-r--r-- 1 root root 2233342 Sep 5 2002
/usr/lib/libc.a
-rw-r--r-- 1 root root 178 Sep 5 2002
/usr/lib/libc.so
Configure command: ./configure '--disable-shared' '--with-mysqld-ldflags=-all-static'
'--with-client-ldflags=-all-static'
'--without-berkeley-db' '--with-innodb' '--without-vio' '--without-openssl' '--enable-assembler' '--enable-local-infile' '--with-mysqld-user=mysql' '--with-unix-socket-path=/var/lib/mysql/mysql.sock' '--prefix=/' '--with-extra-charsets=complex' '--exec-prefix=/usr' '--libexecdir=/usr/sbin' '--sysconfdir=/etc' '--datadir=/usr/share' '--localstatedir=/var/lib/mysql' '--infodir=/usr/share/info' '--includedir=/usr/include' '--mandir=/usr/share/man' '--with-embedded-server' '--enable-thread-safe-client' '--with-comment=Official MySQL RPM'
'CFLAGS=-O6 -fno-omit-frame-pointer
-mpentium' 'CXXFLAGS=-O6 -fno-omit-frame-pointer -felide-constructors -fno-exceptions -fno-rtti -mpentium'
Other System Information: The system is running hardware RAID-10 with SCSI drives. It has 4
Xeon
processors at 2.2GHz each, 2GB RAM.
MySQL Configuration (my.cnf): [mysqld] set-variable = max_connections=1000 set-variable = delayed_queue_size=100000
innodb_data_file_path=ibdata:30M:autoextend:max:2000M # Set buffer pool size to # 50 - 80 % of your computer's # memory set-variable = innodb_buffer_pool_size=1G set-variable = innodb_additional_mem_pool_size=20M # Set the log file size to about # 15 % of the buffer pool size set-variable = innodb_log_file_size=150M set-variable = innodb_log_buffer_size=8M #
log-bin server-id=1 master-host=192.168.1.3 master-user=repl master-password=***** master-port=3306
set-variable = query_cache_size=268435456
Log Entries: [The first entry is repeated many times. The second is from the mysqlcheck cron that repairs the tables]
030715 0:43:49 read_const: Got error 127 when reading table **** 030715 2:00:31 Note: Found 23550 of 23551 rows when repairing ****
Thanks again for your help in advance!
-- Richard Gabriel <[EMAIL PROTECTED]>
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