Preguntando a SQL server con DMV
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En esta sesión veremos algunas consultas que nos permitirán conocer secretos ocultos de Sql Server, que podrían salvarnos en más de una vez en problemas de rendimiento.
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Preguntando a SQL server con DMV
- 1. Preguntando a SQL server con DMV 13 de Mayo 2015 (12 pm GMT -5) Ahias Portillo Resumen: En esta sesión veremos algunas consultas que nos permitirán conocer secretos ocultos de Sql Server, que podrían salvarnos en más de una vez en problemas de rendimiento. Está por comenzar: Próximos Eventos BIML para automatizar patrones de ETL 20 de Mayo Miguel Egea Moderador: Kenneth Ureña Always ON de 0 a 100, lecciones aprendidas de la vida real para un DRP 27 de Mayo Jesus Gil Descubriendo los datos espaciales con SQL Server 6 de Junio John Bulla
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- 6. Preguntando a SQL Server con DMV 13 de Mayo de 2015 Ahias Portillo MVP SQL Server DPA en SolidQ PASS | Líder de capitulo Moderador: Kenneth Ureña
- 7. Sobre Mi 1. Estudiante de Maestría de Base de datos 2. Sql Server MVP 3. Arquitecto de Plataforma de Datos en SolidQ • Líder de Equipo de BI, Desarrollador BI. 4. Especialidad: SSIS y SSAS 5. Speaker de Sql Saturday en Centro América 6. Líder de capitulo PASS en El Salvador 7. Organizador de Sql Saturday El Salvador 7
- 8. Agenda • ¿Que son las DMV? • Tipos de DMV’s • DMV’s para análisis de Índices • Fragmentación • Índices no encontrados • Índices No utilizados, Ineficientes, Utilizados • Información de Ejecuciones de Querys 8
- 9. ¿Que son las DMV? • Disponibles desde Sql Server 2005. • Algunas DMV’s son DMF’s, (Funciones de tipo tabla), que utilizan parámetros. • Todas ellas están dentro de la categoría de DMO’s (Dynamic Management Objects)
- 10. DMV’s Grupos de DMV Grupos de DMV Grupos de DMV Change data capture Full-text search Service Broker Common Language Runtime Index SQL Server Operating System Database Input/Output (I/O) Transaction Database mirroring Query notification Security Execution Replication AlwaysOn Availabulity Group Extended events Resource Governor Database Related Filestream and FileTable Memory-Optimized Change Tracking
- 11. DMV’s para análisis de Índices • Análisis de fragmentación • sys.dm_db_index_physical_stats • Índices no encontrados • sys.dm_db_missing_index_groups • sys.dm_db_missing_index_group_stats • sys.dm_db_missing_index_details 11
- 12. DMV’s para análisis de Índices • Índices No utilizados, Ineficientes, Utilizados • sys.dm_db_index_usage_stats 12
- 13. Información de Ejecuciones de Querys • sys.dm_exec_query_stats • sys.dm_exec_cached_plan • sys.dm_exec_plan_attributes • sys.dm_exec_sql_text 13
- 15. BIML para automatizar patrones de ETL 20 de Mayo (12 pm GMT -5) Miguel Egea Resúmen: Los procesos de extracción transformación y carga de datos suelen ser el impacto en tiempo más grande de todos los procesos construcción de soluciones de inteligencia de negocios. Los estudios lo situan entre el 60% y el 80% del tiempo total de construcción de una solución. Durante la sesión veremos como podemos aprovecharnos de nuestros propios metadatos y el lenguaje BIML de Varigence de forma gratuita para automatizar este tipo de procesos. Próximo Evento
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- Change data capture Change data capture relates to how SQL Server captures change activity (inserts, updates, and deletes) across one or more tables, providing centralized processing. It can be thought of as a combination of trigger and auditing processing in a central area. These DMVs contain information relating to various aspects of change data capture, including transactions, logging, and errors. This group of DMVs occurs in SQL Server 2008 and higher. Common Language Runtime The Common Language Runtime allows code that runs on the database to be written in one of the .NET languages, offering a richer environment and language and often providing a magnitude increase in performance. These DMVs contain information relating to various aspects of the .NET Common Language Runtime, including application domains (these are wider in scope than a thread and smaller than a session), loaded assemblies, properties, and running tasks. Database These DMVs contain information relating to various aspects of databases, including space usage, partition statistics, and session and task space information. Database mirroring The aim of database mirroring is to increase database availability. Transaction logs are moved quickly between servers, allowing fast failover to the standby server. These DMVs contain information relating to various aspects of database mirroring, including connection information and pagerepair details. Execution These DMVs contain information relating to various aspects of query execution, including cached plans, connections, cursors, plan attributes, stored procedure statistics, memory grants, query optimizer information, query statistics, active requests and sessions, SQL text, and trigger statistics. Extended events Extended events allow SQL Server to integrate into Microsoft’s wider event-handling processes, allowing integration of SQL Server events with logging and monitoring tools. This group of DMVs occurs in SQL Server 2008 and higher. Full-text search Full-text search relates to the ability to search character-based data using linguistic searches. This can be thought of as a higher-level wildcard search. These DMVs contain information relating to various aspects of fulltext search, including existing full-text catalogs, index populations currently occurring, and memory buffers/pools. Index These DMVs contain information relating to various aspects of indexes, including missing indexes, index usage (number of seeks, scans, and lookups, by system or application, and when they last occurred), operational statistics (I/O, locking, latches, and access method), and physical statistics (size and fragmentation information). Input/Output (I/O) These DMVs contain information relating to various aspects of I/O, including virtual file statistics (by database and file, number of reads/writes, amount of data read/written, and I/O stall time), backup tape devices, and any pending I/O requests. Object These DMVs contain information relating to various aspects of dynamic management objects; these relate to object dependencies. Query notification These DMVs contain information relating to various aspects of query notification subscriptions in the server. Replication These DMVs contain information relating to various aspects of replication, including articles (type and status), transactions, and schemas (table columns). Resource Governor In the past, running inappropriate ad hoc queries on the database sometimes caused timeout and blocking problems. SQL Server 2008 implements a resource governor that controls the amount of resources different groups can have, allowing more controlled access to resources. These DMVs contain information relating to various aspects of Resource Governor, including resource pools, governor configuration, and workload groups. This group of DMVs occurs in SQL Server 2008 and higher. Service Broker Service Broker is concerned with providing both transactional and disconnected processing, allowing a wider range of architectural solutions to be created. These DMVs contain information relating to various aspects of Service Broker, including activated tasks, forwarded messages, connections, and queue monitors. SQL Server Operating System These DMVs contain information relating to various aspects of the SQL Server Operating System (SQLOS), including performance counters, memory pools, schedulers, system information, tasks, threads, wait statistics, waiting tasks, and memory objects. Transaction These DMVs contain information relating to various aspects of transactions, including snapshot, database, session, and locks. Security These DMVs contain information relating to various aspects of security, including audit actions, cryptographic algorithms supported, open cryptographic sessions, and database encryption state (and keys).