… was a text-based program for entering records into an ISAM-style database. It would have an 80×24 text UI for… believe this to be the maximum number of columns you can create. If you try setting the storage engine to InnoDB however, you… of 1,000 columns. This is the code from ha_innodb.cc that enforces that limit: if (form->s->fields > 1000…
Comment: Should you move from MyISAM to Innodb ?
June 1, 2012 By 59 Comments
…’ve changed all my existing iSAM tables into innoDB and I had faced a huge problem. With iSAM, I can reuse existing database… on the first machine. The problem occurs when I tried to reuse the existing database on another machine. It is not… hotel database. Please instruct to overcome this issue if I made a mistake here with the innoDB when i creating the databases…
Post: AUTO_INCREMENT and MERGE TABLES
September 11, 2008 By Leave a Comment
… with old ISAM tables. Such behavior does not only corresponds to TRUNCATE – deleting last row will cause auto_increment value to be reused… Tables works differently from both MyISAM and Innodb tables and being similar to what ISAM tables used to have. As the side effect of… continue having old file descriptors open not seeing changes done to original table: mysql> select * from am; +—–+ | i | +—–+ | 2 | | 3 | | 5…
Post: Ultimate MySQL variable and status reference list
January 8, 2011 By 4 Comments
…_assign_to_keycacheblogpercona….innodb_change_bufferingblogpercona.commanual innodb_checksumsblogpercona.commanual innodb_commit_concurrencyblogpercona.commanual innodb_concurrency_ticketsblogpercona.commanual innodb_data_file_pathblogpercona.commanual Innodb_data_fsyncsblogpercona.commanual innodb…
Comment: InnoDB vs MyISAM vs Falcon benchmarks - part 1
July 22, 2011 By 117 Comments
My ISAM InnoDB Required full text Search Yes Require Transactions Yes frequent select … you can conclude which has to be chosen either innodb or MyISAM. http://developer99.blogspot.com/2011/07/mysql-innodb-vs-myisam.html
Post: MySQL Server Variables - SQL layer or Storage Engine specific.
June 8, 2006 By 14 Comments
… Monty used to make was – it is not really MyISAM specific. key_buffer was also used by now retired ISAM storage engine… was designed for MyISAM tables. It makes little sense to use it with Innodb tables for example. Note “flush” means “close file… as Innodb to not use this variable. sort_buffer_size Buffer used to sort result set (allocated by each thread once sorting needs to…
Post: How much memory can MySQL use in the worst case?
February 12, 2009 By 17 Comments
… up to key_buffer_size + (read_buffer_size + sort_buffer_size)*max_connections”. This was never true — not even when ISAM and… servers these days need to consider the added memory for InnoDB: specifically, the buffer pool. (There’s also an innodb_additional_mem_pool… non-Percona server. And InnoDB has other needs that it doesn’t actually promise to fit within innodb_additional_mem_pool_size, by…
Comment: Full text search for all MySQL Storage Engines
February 28, 2007 By 37 Comments
… liek to switch to something “better”. I wonder if switching to a mix of innodb and myisam could help. Running the table under Innodb and having an extar fulltext ISAM table. This… do you think that sphinx would a better solution? Regards to you and vadim Gunnar
Post: What does Handler_read_rnd mean?
June 15, 2010 By 15 Comments
… here, hearkening back to before I was involved with MySQL, way back when it was a wrapper around ISAM tables — or even… byte offset from the beginning of the file. For InnoDB, it means to read a row based on a primary key value…” meant “random,” but now I can’t find a reference to that conversation. In any case, one of the operations is…
Comment: How to find wrong indexing with glance view
March 8, 2010 By 27 Comments
Here’s to hoping that eventually MySQL’s InnoDB becomes close to on par with the competition – in particular that other open … least 3rd normal form and integrity constraints. You realize that ISAM was perhaps a reasonable choice in 1965 for a production… indexes on FKs. The database designer should be able to choose what to do. Having them by default might be ok but…
