informatique:sgbd:mysql
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informatique:sgbd:mysql [21/03/2021 11:48] – [Articles] cyrille | informatique:sgbd:mysql [21/03/2021 12:02] – [Replication] cyrille | ||
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===== Replication ===== | ===== Replication ===== | ||
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* With MyISAM tables that have no deleted rows, you can insert rows at the end at the same time that another query is reading from the table. If this is important for you, you should consider using the table in ways that avoid deleting rows. Another possibility is to run **OPTIMIZE TABLE after you have deleted a lot of rows**. | * With MyISAM tables that have no deleted rows, you can insert rows at the end at the same time that another query is reading from the table. If this is important for you, you should consider using the table in ways that avoid deleting rows. Another possibility is to run **OPTIMIZE TABLE after you have deleted a lot of rows**. | ||
- | ==== Comparaison InnoDB BuiltIn vs Plugin ==== | ||
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- | Comparaison tpc-c entre la version embarquée de InnoDB et le plugin InnoDB sur une instance Amazon c1.xlarge et du MySQL 5.1.43. Pas de tuning particulier => +100% !!! | ||
- | * en abscisses, le temps : 20 minutes de mesure avec 10 minutes de chauffe | ||
- | * en ordonnées, le nombre de transactions | ||
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- | Author: [[http:// | ||
informatique/sgbd/mysql.txt · Dernière modification : 31/10/2022 18:37 de cyrille