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Myisamchk Error Is Not A Myisam-table

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Connectors More MySQL.com Downloads Developer Zone Section Menu: Documentation Home MySQL 5.7 Reference Manual Preface and Legal Notices General Information Installing and Upgrading MySQL Using MySQL as a Document Store Tutorial MySQL Programs MySQL mysql repair table command Server Administration Security Backup and Recovery Backup and Recovery Types Database Backup Methods

Myisamchk Repair

Example Backup and Recovery Strategy Establishing a Backup Policy Using Backups for Recovery Backup Strategy Summary Using mysqldump for Backups mysql repair crashed table Dumping Data in SQL Format with mysqldump Reloading SQL-Format Backups Dumping Data in Delimited-Text Format with mysqldump Reloading Delimited-Text Format Backups mysqldump Tips Making a Copy of a Database Copy a Database

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from one Server to Another Dumping Stored Programs Dumping Table Definitions and Content Separately Using mysqldump to Test for Upgrade Incompatibilities Point-in-Time (Incremental) Recovery Using the Binary Log Point-in-Time Recovery Using Event Times Point-in-Time Recovery Using Event Positions MyISAM Table Maintenance and Crash Recovery Using myisamchk for Crash Recovery How to Check MyISAM Tables for Errors How to Repair MyISAM Tables MyISAM Table Optimization Setting myisamchk: error: can't create new tempfile Up a MyISAM Table Maintenance Schedule Optimization Language Structure Globalization Data Types Functions and Operators SQL Statement Syntax The InnoDB Storage Engine Alternative Storage Engines High Availability and Scalability Replication MySQL Cluster NDB 7.5 Partitioning Stored Programs and Views INFORMATION_SCHEMA Tables MySQL Performance Schema MySQL sys Schema Connectors and APIs Extending MySQL MySQL Enterprise Edition MySQL Workbench MySQL 5.7 Frequently Asked Questions Errors, Error Codes, and Common Problems Restrictions and Limits Indexes MySQL Glossary Related Documentation MySQL 5.7 Release Notes Download this Manual PDF (US Ltr) - 35.6Mb PDF (A4) - 35.6Mb PDF (RPM) - 34.6Mb EPUB - 8.7Mb HTML Download (TGZ) - 8.4Mb HTML Download (Zip) - 8.5Mb HTML Download (RPM) - 7.3Mb Eclipse Doc Plugin (TGZ) - 9.3Mb Eclipse Doc Plugin (Zip) - 11.4Mb Man Pages (TGZ) - 202.2Kb Man Pages (Zip) - 307.4Kb Info (Gzip) - 3.3Mb Info (Zip) - 3.3Mb Excerpts from this Manual MySQL Backup and Recovery MySQL Globalization MySQL Information Schema MySQL Installation Guide MySQL and Linux/Unix MySQL and OS X MySQL Partitioning MySQL Performance Schema MySQL Replication Using the MySQL Yum Repository MySQL Restrictions and Limitations Security in MySQL MySQL and Solaris Building MySQL from Source S

very easily. In this article, I'll explain how to use myisamchk to identify and fix table corruption in

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MyISAM. When a table is created under MySQL, it creates three

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different files: *.frm file to store table format, *.MYD (MyData) file to store the data, and *.MYI myisamchk: error: myisam_sort_buffer_size is too small (MyIndex) to store the index. I prefer to use InnoDB as the storage engine for bigger database, as it resembles Oracle and provides commit, rollback options. I got https://dev.mysql.com/doc/refman/5.7/en/myisam-repair.html the following error from a production bugzilla application that is using MySQL database. From the error message, it is clear that attach_data table is corrupted and needs to be reparied. The corrupted table can be repaired using myisamchk as explained below. undef error - DBD::mysql::db selectrow_array failed: Table 'attach_data' is marked as crashed and should be http://www.thegeekstuff.com/2008/09/how-to-repair-corrupted-mysql-tables-using-myisamchk/ repaired [for Statement "SELECT LENGTH(thedata) FROM attach_data WHERE id = ?"] at Bugzilla/Attachment.pm line 344 Bugzilla::Attachment::datasize('Bugzilla::Attachment=HASH(0x9df119c)') called 1. Identify all corrupted tables using myisamchk # myisamchk /var/lib/mysql/bugs/*.MYI >> /tmp/myisamchk_log.txt myisamchk: error: Wrong bytesec: 0-0-0 at linkstart: 18361936 MyISAM-table 'attach_data.MYI' is corrupted Fix it using switch "-r" or "-o" myisamchk: warning: 1 client is using or hasn't closed the table properly MyISAM-table 'groups.MYI' is usable but should be fixed myisamchk: warning: 1 client is using or hasn't closed the table properly MyISAM-table 'profiles.MYI' is usable but should be fixed When you redirect the output of myisamchk to a temporary file, it will display only the corrupted table names on the screen. The /tmp/myisamchk_log.txt file will contain information about all the tables including the good ones, as shown below: Checking MyISAM file: user_group_map.MYI Data records: 182 Deleted blocks: 0 - check file-size - check record delete-chain - check key delete-chain - check index reference - check data record references index: 1 2. Repair the corrupted table using myisamc

repair large MyISAM tables in MySQL, you can run into the following restriction, because of the limited size of the default Sort Buffer. srv # myisamchk -r table.MYI - recovering (with sort) MyISAM-table 'table.MYI' Data records: 335045 - Fixing index 1 Found block https://ma.ttias.be/mysql-myisamchk-error-myisam_sort_buffer_size-is-too-small/ that points outside data file at 1509428340 Found link that points at 61778810452273 (outside data http://dba.stackexchange.com/questions/36022/mysql-table-not-repairing file) at 1509428348 - Fixing index 2 - Fixing index 3 - Fixing index 4 - Fixing index 5 - Fixing index 6 - Fixing index 7 - Fixing index 8 myisamchk: error: myisam_sort_buffer_size is too small MyISAM-table 'table.MYI' is not fixed because of errors While the fix seems obvious (increase the myisam_sort_buffer_size), it's a bit confusing. The MySQL server knows repair table 2 variables, myisam_sort_buffer_size and sort_buffer_size. The first one is the one used for the buffer in "Repair by sort". The second one is used to buffer a filesort. The myisamchk command does not have myisam_sort_buffer_size. myisamchk has only sort_buffer_size, which is used for "Repair by sort". The following increases the buffer size that is needed. srv # myisamchk -r -q table.MYI --sort_buffer_size=2G Or increase the memory, if it's still not sufficient to do the repair. Hi! My repair table mysql name is Mattias Geniar. I'm a Support Manager at Nucleus Hosting in Belgium, a general web geek, public speaker and podcaster. If you're interested in keeping up with me, have a look at my podcast and weekly newsletter below. For more updates, follow me on Twitter as @mattiasgeniar. I respect your privacy and you won't get spam. Ever.Just a weekly newsletter about Linux and open source. SysCast podcast In the SysCast podcast I talk about Linux & open source projects, interview sysadmins or developers and discuss web-related technologies. A show by and for geeks! cron.weekly newsletter A weekly newsletter - delivered every Sunday - for Linux sysadmins and open source users. It helps keeps you informed about open source projects, Linux guides & tutorials and the latest news. Share this post Did you like this post? Will you help me share it on social media? Thanks! Comments Daniel Monday, March 21, 2011 at 11:43 Thanks man. It helped Reply ↓ Mansor Friday, May 20, 2011 at 21:11 How you figure out which variable size must give? I'm repairing tables: -rw-rw--- 1 mysql mysql 25G Apr 16 07:12 table1#P#p1.MYD -rw-rw--- 1 mysql mysql 3.8G May 20 14:03 table1#P#p1.MYI I'm trying with: myisamchk -f table1#P#p1.MYI -sort_buffer_size=4G I't has something to do with the index size? Reply ↓ Matti Saturday, May 21, 2011 at 15:43 Try incrementing in

log in tour help Tour Start here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Database Administrators Questions Tags Users Badges Unanswered Ask Question _ Database Administrators Stack Exchange is a question and answer site for database professionals who wish to improve their database skills and learn from others in the community. Join them; it only takes a minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the top MySQL Table not repairing up vote 1 down vote favorite 1 Table info: Database name: user_motiva Table name: wp_options.frm wp_options.MYD wp_options.MYI wp_options.TMD when I do a mysqlcheck -r --all-databases it gets hung on that table even if you let it sit all day. Is there anther way to fix/repair/recover that table? Should I use myisamchk? I saw something like: shell> myisamchk --recover City My config on a 16GB ram box cat /etc/my.cnf [mysqld] default-storage-engine=MyISAM local-infile=0 symbolic-links=0 skip-networking max_connections = 500 max_user_connections = 20 key_buffer = 512M myisam_sort_buffer_size = 64M join_buffer_size = 64M read_buffer_size = 12M sort_buffer_size = 12M read_rnd_buffer_size = 12M table_cache = 2048 thread_cache_size = 16K wait_timeout = 30 connect_timeout = 15 tmp_table_size = 64M max_heap_table_size = 64M max_allowed_packet = 64M max_connect_errors = 10 query_cache_limit = 1M query_cache_size = 64M query_cache_type = 1 low_priority_updates=1 concurrent_insert=ALWAYS log-error=/var/log/mysql/error.log tmpdir=/home/mysqltmp myisam_repair_threads=4 [mysqld_safe] open_files_limit = 8192 log-error=/var/log/mysql/error.log [mysqldump] quick max_allowed_packet = 512M [myisamchk] key_buffe

 

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