SQL Performance

MARCH 17, 2020

I will be using the 50GB Stack Overflow 2013 database , but any large table with a low number of distinct values would do. The Stack Overflow 2013 database comes without nonclustered indexes to minimize download time. It has 32GB RAM, with 24GB available to the SQL Server 2019 instance. Test Environment.

Servers 86

Servers Tuning Database Efficiency 86

SQL Performance

SEPTEMBER 17, 2019

Many database administrators find themselves having to support instances of SQL Server Reporting Services (SSRS), or at least the backend databases that are required for SSRS. SSRS 2008 brought that component into the reporting service module. Unlike the system database tempdb, ReportServerTempDB is not recreated at startup.

Tuning 67

Tuning Servers Database Best Practices 67

SQL Performance

APRIL 26, 2019

If so, you may have heard about the Azure SQL Database DTU calculator , and you may have also read about how it has been reverse engineered by Andy Mallon. Database – Log Bytes Flushed/sec. When I looked through the SentryOne database, I found that 3 of the 4 counters were already being captured by default.

Azure 40

Azure Database Metrics Servers 40

SQL Performance

OCTOBER 29, 2019

In order to use Query Store and Extended Events, you have to configure them in advance – either enabling Query Store for your database(s), or setting up an XE session and starting it. DMV data is always available, so very often it's the easiest method to get a quick first look at query performance. total_worker_time / qs. ORDER BY qs.

C++ 74

C++ Database Servers Tuning 74

SQL Server According to Bob

JULY 12, 2016

For SQL Server 2008, 2012 and 2014 the trace flag behavior remains the same. For SQL Server 2016 the trace flags are available but the behavior may be altered by the design changes. Trace flag 2549 is used to change how DBCC sees the volume layout of the database.

Servers 40

Servers Design Engineering Database 40

Highly Scalable

MARCH 10, 2015

This approach can be expressed in more formal way by the following equation: where is the data available for analysis, is the space of a retailer’s actions and decisions, is an econometric model defined as a function of actions and data, and is the optimal strategy. This framework resembles the approach suggested in [JK98].

Retail 152

Retail C++ Analytics Metrics 152

Percona

JUNE 4, 2023

Before we dive into the differences between MariaDB and MySQL, we will provide a thorough examination of each relational database management system (RDBMS). While originally designed to be a drop-in replacement for MySQL, it evolved into its own distinct database management system and is now maintained and supported by the MariaDB Foundation.

Open Source 52

Open Source Servers Storage Scalability 52

SQL Performance

JANUARY 22, 2020

Table-valued parameters have been around since SQL Server 2008 and provide a useful mechanism for sending multiple rows of data to SQL Server, brought together as a single parameterized call. Where this really can make a difference is in cloud implementations where you are paying for more than just compute and storage resources.

Servers 55

Servers Azure Hardware Network 55

O'Reilly

JULY 25, 2023

And if I switch tabs to view a paper from 2008, then a song from 2008 could start up. To provide some coherence to the music, I decided to use Taylor Swift songs since her discography covers the time span of most papers that I typically read: Her main albums were released in 2006, 2008, 2010, 2012, 2014, 2017, 2019, 2020, and 2022.

Programming 98

Programming Code Design Benchmarking 98

O'Reilly Software

OCTOBER 23, 2018

In 2008 or so, when data scientist emerged as a job title, it was widely ridiculed as a nonjob: the thought that people who just worked with data could be scientists, or employ the rigors of their time-honored methods, was literally laughable in many circles. To do so, we borrow metaphors from roles in other industries.

Strategy 100

Strategy Architecture Technology Technology 100

SQL Performance

MAY 16, 2019

If both sort and no-sort alternatives are available, the optimizer will make a cost-based choice. The following script should be run on a development SQL Server instance in a new test database set to use the SIMPLE or BULK_LOGGED recovery model. If it can internally guarantee ordering in other ways, the Sort may be omitted.

Cache 67

Cache Servers Testing Storage 67

SQL Performance

AUGUST 27, 2019

Single-Socket Database Servers. Among the 19 public processor SKUs, there are preferred choices for SQL Server at each available core count. This processor family has enough compute horsepower, memory bandwidth and capacity, and I/O bandwidth to support large server workloads on a single-socket server. Preferred AMD EPYC Processors.

Servers 52

Servers Benchmarking Virtualization Architecture 52

SQL Server According to Bob

JANUARY 26, 2017

Transparent Data Encryption (TDE) is a feature that was introduced in SQL Server 2008 (and is also available for Azure SQL Database, Azure SQL Data Warehouse, and Parallel Data Warehouse) with the purpose of encrypting your data at rest. That is to ensure your database is encrypted at the file level.

Servers 40

Servers Database Azure Cache 40

SQL Performance

MAY 29, 2019

It can be activated from SQL Server 2008 to 2014 inclusive using documented trace flag 610. The test table schema is such that 130 rows can fit on a single 8KB page when row versioning is off for the database. Available by default from SQL Server 2016 (trace flag 692 disables). Absolute minimum of I >= 100.

Cache 64

Cache Testing Servers Code 64

SQL Server According to Bob

JANUARY 11, 2020

​​​​ Note:​​ The BID/SNI ​​ Trace for the ​​ SQL Server (SQL 2008’ish ​​ days) used to require ETW setup and a restart of SQL Server. ​​​​ Instead of using ETW the output is written to a text file, registered in ODBCINST.INI.

Network 40

Network Servers Processing Software Engineering 40

Percona

JANUARY 14, 2019

What if we use ClickHouse (which is a columnar analytical database) as our main datastore? Well, typically, an analytical database is not a replacement for a transactional or key/value datastore. Although such databases can be very efficient with counts and averages, some queries will be slow or simply non existent. Text search.

Database 48

Database Analytics Blockchain Healthcare 48