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Thursday, 28. February 2008
Table care!
shantanuo
19:37h
CHECK TABLE performs an integrity check on the structure and content of your tables. For MyISAM tables, it will also update the index statistics. If problems appear, proceed to ...
REPAIR TABLE is for MyISAM tables only and will correct corrupted tables. InnoDB tables should be dumped with mysqldump and restored. ANALYZE TABLE updates a table's information about keys for queries so that the data can be found faster and not having to hunt for it. This works for both MyISAM and InnoDB. OPTIMIZE TABLE defragments MyISAM tables, sorts indexes, and updates the statistics to speed up searches. ... Comment |
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Last modified: 2009.06.20, 07:22 Status
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tmpdir in MySQL In MySQL,
the tmpdir path is mainly used for disk-based sorts (if...
by shantanuo (2009.06.20, 07:22)
Install SQLite $ # As
of March 2009, the latest version was 3.6.11.
$ wget...
by shantanuo (2009.05.13, 19:24)
Using binlogs to update table
It is very interesting to know about how to extract...
by shantanuo (2009.05.11, 21:43)
awk power $ cat salaries
Yvette van der Hoff 100000
Sarack Abama 400000
Bernie Madoff...
by shantanuo (2009.05.04, 20:07)
skip networking in MySQL When
there is maintenance work to be carried on the database...
by shantanuo (2009.05.03, 21:04)
Saving data to text file
sqlite> .mode list
sqlite> .separator |
sqlite> .output test_file_1.txt
sqlite>...
by shantanuo (2009.05.02, 20:31)
Silent mode in Linux Sick
of your computer speaker beeping like a demented Morse code...
by shantanuo (2009.04.30, 12:51)
valid date validdate.sh script will
look like this...
#!/bin/sh
userdate=$1
date -d $userdate &> /dev/null...
by shantanuo (2009.04.13, 15:44)
IP addresses from access log
generate a list of IP address along with the number...
by shantanuo (2009.04.07, 12:04)
Backup a directory #!/bin/sh
tar czvf $1.$(date +%Y%m%d-%H%M%S).tgz $1
exit $?
The arc script accepts...
by shantanuo (2009.04.06, 15:47)
Time Zone error on slave
Last_Error: Error 'Unknown or incorrect time zone: 'Etc/UTC'' on query....
by shantanuo (2009.03.30, 13:05)
pager to md5sum When optimizing
queries by rewriting them to different forms that should return...
by shantanuo (2009.03.30, 13:03)
setting at jobs # at
-v 03:00 -f /root/shantanu/testat.sh > /root/shantanu/testat_result.txt 2>&1
# atq
7...
by shantanuo (2009.03.13, 10:07)
better code `test -s /var/log/mailme.txt`
if [[ $? -eq 0 ]] ; then
The above...
by shantanuo (2009.03.10, 18:15)
read .csv file #!/bin/sh
awk -F"," '{print $1,$2}' read1.txt | while read var1 var2
do...
by shantanuo (2009.03.10, 18:03)
common crontab entry 30 0
* * * updatedb > /dev/null 2>&1
# Clock synchronization...
by shantanuo (2009.03.10, 10:20)
Declare your assets! The declare
command can be helpful in identifying variables, environmental or otherwise....
by shantanuo (2009.03.01, 18:48)
Innodb troubleshooting When you have
your mysql up and running, just connect to any database...
by shantanuo (2009.02.26, 12:59)
Watch replication $ watch --interval=1
--differences 'mysql -uuser -ppassword -e "show slave status\G"'
by shantanuo (2009.02.25, 18:30)
findtable shell script # vi
/bin/findtable
#!bin/sh
mysql -e"select TABLE_SCHEMA, TABLE_NAME, ENGINE, TABLE_ROWS, CREATE_TIME FROM...
by shantanuo (2009.02.05, 17:31)
processor info Gather information about
the processor. This is easily done as follows:
# cat...
by shantanuo (2009.01.20, 19:44)
Help Me! You can use
the mysql client to perform lookups in the MySQL manual....
by shantanuo (2009.01.02, 20:33)
Show only PHP errors Open
/etc/php.ini file
# vi /etc/php.ini
Set error_reporting as follows:
error_reporting...
by shantanuo (2008.12.31, 16:46)
optimize all tables mysql -e"SELECT
CONCAT('OPTIMIZE TABLES ', GROUP_CONCAT(TABLE_SCHEMA, '.', TABLE_NAME ORDER BY TABLE_SCHEMA, TABLE_NAME...
by shantanuo (2008.11.11, 17:14)
Unix cheatsheets Cheat sheet act
as a reference tool which provides cut and paste kind...
by shantanuo (2008.11.08, 19:30)
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