If I remember correctly from the certification guide, MySQL opens a file handle for each table opened. When you have a MyISAM table, that's one file handle each for the structure, data and index files. So if you have a query that uses only one table, it can spawn up to 3 file handles.....and it's multiplied for multiple connections and joins.
Talk to the sysadmin managing the MySQL box on the system about what the current setting is and s/he thinks it should be. -Sheeri On 5/24/06, mel list_php <[EMAIL PROTECTED]> wrote:
Hi! We have that huge query against a mysql 4.1 (myisam) to retrieve rows. The query is built dynamically using a loop, as we are searching in an external database built to store a tree with the nested tree model. When we do this search with a "normal" world, it's fine: the query is around 4 lines. If we search with a very "frequent" word, we get a lot of hits, and the query becomes very long (probably around 300 lines), and we get the errno24 Looking at the doc: http://dev.mysql.com/doc/refman/4.1/en/not-enough-file-handles.html so apparently I don't have enough file handlers. Ok, don't mind increasing that.They say to modify the open_files_limit variable. #open_files_limit The number of files that the operating system allows mysqld to open. This is the real value allowed by the system and might be different from the value you gave using the --open-files-limit option to mysqld or mysqld_safe. The value is 0 on systems where MySQL can't change the number of open files. This variable was added in MySQL 3.23.20. 2 questions: - any idea of the value I should put there? mysqld is running on a machine I don't manage, what should I ask for? - is it possible to modify this value in the conf file and to reload that file without stopping/re starting the server? Additionnally, any pointer on a doc explaining why and when is mysql opening a new file? Thanks, melanie _________________________________________________________________ Are you using the latest version of MSN Messenger? Download MSN Messenger 7.5 today! http://join.msn.com/messenger/overview -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/[EMAIL PROTECTED]
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