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docker-postgres-pgpool's Introduction

docker-postgres-pgpool

Docker compose básico de PostgreSQL con el middleware Pgpool-II (Connection Pooling, In Memory Query Cache)

Enlaces de interés:

Configuración de In Memory Query Cache de Pgpool

  • Cachear solo las tablas especificadas (lista separada por comas, admite regex)
    white_memqcache_table_list = '.*_cache_ok'
  • NO cachear las tablas especificadas (lista separada por comas, admite regex)
    black_memqcache_table_list = '.*_cache_ng'
  • NO cachear cuando el resultado supera un tamaño (default 400KB)
    memqcache_maxcache = 409600
  • Especificar en la propia sentencia que no se cachee
/* NO QUERY CACHE */ SELECT * FROM table_cache_ok WHERE a = 1;
  • Cuándo expira (en segundos) un resultado cacheado (0 significa que no expira)
    memqcache_expire = 5

Nota: en pgpool-extra.conf el parámetro log_per_node_statement = on
no es realmente necesario. Nos sirve para ver en el log cómo maneja y cachea cada sentencia.

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