postgresql vs oracle performance 2016

with excellent performance. Refer:Http://bbs.chinaunix.net/viewthr. .. Page % 3d1 page = 1 Quote:0.2 billion of a single table, slect crount (*) from table; to scan the entire table. Same configuration single host hardware: 8 GB memory, each machine is two dual-core amd86. disk RAID 0 + 1 It took 50 seconds for Oracle 10 Gb, and PostgreSQL's common cluster was used for 1 minute 40 seconds. The speed of us

, although 5.6.5 made a significant improvement, but PostgreSQL support table connection is better, especially MySQL does not support the full outside connection, therefore, this aspect of PostgreSQL better than MySQL; JSON support and Nosql:postgresql have recently added JSON support, which provides greater data storage flexibility than a traditional relational database, so

Tags: size arrangement SDN Technology share ext ODBC. NET Analysis tool downPostgreSQL Hardware Performance Tuning Translated from the article "PostgreSQL Hardware performance Tuning" PostgreSQL is an object-relational database developed by developers all over the world on the Internet. She is an open so

PostgreSQL Performance Monitoring ToolsHttps://github.com/CloudServer/postgresql-perf-toolsThis package includes three useful scripts aimed to help to pinpoint performance issues on systems with PostgreSQL as data Base backend.All Scritps is written in Python. Requirements:

, and the V1 on the sort is almost 3 times times the V2. Further testing, if added limit ... offset (often used with order by for paging), the gap between the two view is more pronounced: If you remove the sort operation, the V1 query will take more time than V2, but it is almost an order of magnitude less than before. Confined to space, this place does not map. The number of records in this test is less than million, you can see the gap between the two views, interested peers can self-verify

Oracle and postgresql join methodFirst, we will introduce several oracle multi-Table Connection Methods:Nested loop: nested loop, which is actually a dual FOR LOOP1. The driver table (External table) and search table (internal table) are divided here)2. To search for a table with an index, you can use an index to find and match the table, improving the efficiency

I. we can improve the performance by configuring the Shared Pool to ensure that users find cached statements in the memory. Another important method is: this allows users to find the data they requested in the memory! This requires the database buffer cache (the High-speed cache area of the database buffer. Buffer cache is a component of SGA used to cache copies of data blocks recently accessed by users in the database. These copies are synchronized w

THAN (to_date (' 2016-01-01 ', ' yyyy-mm-dd ') tablespace partition_p_name2,PARTITION Partition_p_name3 VALUES Less THAN (to_date (' 2017-01-01 ', ' yyyy-mm-dd ') tablespace Partition_p_name3,PARTITION partition_p_name4 VALUES Less THAN (to_date (' 2018-01-01 ', ' yyyy-mm-dd ') tablespace partition_p_name4,PARTITION partition_p_name5 VALUES Less THAN (to_date (' 2019-01-01 ', ' yyyy-mm-dd ') tablespace partition_p_name5,PARTITION Partition_p_max VALU

recommended to use Firefox chrome Ie10 and other browsers to see the report, generated HTML reports need and crt.js in a directory to see the chart report. If you still can't see the chart, send HTML to Valen point [email protected] dot com I'll take the time to look. Tip4:awrcrt.sql placed on the server, if the use of VI paste, pay attention to check the size of the number of rows, often the environment, copy large files to lose characters. Preferably FTP up. TIP5: There is no intention to dea

2016-08-11 Chen Long-mo College Explore Oracle High water level impact on database performance1Hello everyone! I am a chen long from the cloud and Emme, and I am currently primarily responsible for Oracle technical support work. When I began to learn Oracle, listen to Eygle teacher said, to learn technology, must do mo