I touched briefly on TOAST (which I learned had nothing to do with grilled bread, but rather the «The Oversized-Attribute Storage Technique » where PostgreSQL breaks up large field values into multiple chunks) and VACUUM (purging obsolete rows and reclaiming space within tables). I shared some of the main configuration parameters that I learned to tune in order to get the best performance from my databases (because the default values of some of the parameters in the nf are designed to create a database that uses minimal resources rather than one designed for real-world applications). For example, documentation, booleans, managing privileges (where it’s possible to grant privileges on all objects in an entire schema, to grant default privileges, i.e., privileges on objects that don’t yet exist or grant truncate privileges on a table). I highlighted the (many) things that PostgreSQL does well. In my session, I spoke about the things I felt were missing in PostgreSQL, for example, partitioning functionality (although that is gradually being introduced with each new version) and RAC. I also encountered surprises-like how fast it is to install PostgreSQL and create a database instance, or the fact that there is no DUAL table. I experienced some frustrations, for example, trying to exit psql prior to version 11 or having to learn my way around the PostgreSQL catalog and information schema. upper case object names, autocommit mode, the different ways in which they deal with concurrent reads/writes (multiversion concurrency control or MVCC). In addition, I compared some of the differences between Oracle and PostgreSQL: WAL vs. I also discussed some of the similarities between Oracle and PostgreSQL that enabled me to feel less “lost”: databases, instances, datafiles, tablespaces, schemas, configuration files, tables, views, indexes, constraints. I shared with attendees how I taught myself to install, configure, and manage PostgreSQL databases. I recalled what it was like to come into contact with PostgreSQL for the first time with 20 years’ experience as an Oracle DBA under my belt, feeling like a newly-recruited junior DBA. Para una geodatabase de edición altamente activa y multiversionada, los archivos de base de datos del espacio de tablas VERSIONS pueden estar separados y repartidos en varios discos disponibles para evitar los conflictos de entrada/salida.Įn la tabla siguiente se incluyen los espacios de tabla que se recomienda crear para almacenar las tablas y las clases de entidad del espacio de trabajo.At EDB’s recent virtual event, Postgres Vision 2020, I spoke about my journey through the world of database administration, starting as a junior Oracle DBA, taking a detour via SQL Server and Sybase before arriving, 20 years later, at PostgreSQL. Por razones de rendimiento, es preferible colocar las tablas de negocios, entidades e índices espaciales por separado y colocar los archivos de datos de espacio de tablas en función de su patrón de uso. Las recomendaciones de almacenamiento de SIG estándar favorecen el mantenimiento del índice y de los archivos de registro separados del vector y las tablas de negocios. Use scripts to create roles, directories, tablespaces and permissions.
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