SQL Server According to Bob

SEPTEMBER 26, 2016

When we released Always On Availability Groups in SQL Server 2012 as a new and powerful way to achieve high availability, hardware environments included NUMA machines with low-end multi-core processors and SATA and SAN drives for storage (some SSDs). Direct seeding of new database replicas. . Direct seeding of new database replicas.

Availability 40

Availability Servers Hardware Benchmarking 40

Brendan Gregg

NOVEMBER 29, 2017

In this configuration, the AMI and boot is paravirt (PV), the kernel is making hypercalls instead of privileged instructions, and the system is using paravirt network and storage drivers. But not all workloads: some are network bound (proxies) and storage bound (databases). ## 5. The AMI and boot are now HVM.

Virtualization 110

Virtualization AWS Hardware Storage 110

Percona

SEPTEMBER 19, 2023

This type of backup is suitable for large, important databases that need to be recovered quickly when problems occur. Physical backups are the backups that consist of raw copies of the directories and files that store database contents. Copyright (c) 2016, 2023, Oracle and/or its affiliates. Type 'help' or '?'

C++ 124

C++ Servers Storage Speed 124

Scalegrid

JANUARY 19, 2024

Data-bearing members face a higher risk of encountering issues caused by rollbacks, compared to others who utilize different storage methods. For example, memory-resident databases without persistent disks, such as Redis cluster setups or Apache Spark installations, rely on stand-alone machines.

Database 130

Database Network Servers Monitoring 130

Percona

AUGUST 18, 2023

Why not just create another database on the same instance? We split databases by function/team to give each team full autonomy over their schema, And if someone screws up, it breaks their cluster, not all databases. So you put multiple MySQL servers on a single machine instead of multiple databases inside one MySQL instance.

Programming 98

Programming Servers Database Open Source 98

Alex Russell

MARCH 6, 2021

Back in 2016, I gave a talk outlining the causes and effects of the terrible performance of web apps built using popular tools on the fastest-growing device segment: low-end to mid-range Android phones. A then-representative $200USD device had 4-8 slow (in-order, low-cache) cores, ~2GiB of RAM, and relatively slow MLC NAND flash storage.

Performance 127

Performance Network Mobile Metrics 127

SQL Performance

MAY 1, 2020

In a recent tip , I described a scenario where a SQL Server 2016 instance seemed to be struggling with checkpoint times. I was a bit perplexed by this issue, since the system was certainly no slouch — plenty of cores, 3TB of memory, and XtremIO storage. Change the Target Recovery Time of a Database.

C++ 58

C++ Database Servers Storage 58

Percona

JANUARY 17, 2019

now has a version which will support parallelism for SELECT queries (utilizing the read capacity of storage nodes underneath the Aurora cluster). I’m using the “Airlines On-Time Performance” database from [link] (You can find the scripts I used here: [link] ). SSD) we can’t utilize the full potential of IOPS with just one thread.

Cache 72

Cache C++ AWS Airlines 72

SQL Server According to Bob

NOVEMBER 8, 2016

SQL Server 2016 Service Pack 1 (all SKUs) , in combination with Windows Server 2016 (All SKUs) or Windows 10 Client introduces non-volatile memory support for the tail of the log file (LDF) which can significantly increase transaction throughput. Block storage is what you think of today as disk access. Tail Of Log Caching.

Cache 40

Cache Servers Media Storage 40

VoltDB

AUGUST 27, 2024

Volt Active Data (Volt) is a sophisticated real-time data platform intricately designed with multiple critical components, including high-speed data processing, in-memory storage, and ACID-compliant transactions. These exported records will be written to an external system (such as another database, CSV files, or another streaming platform).

Testing 52

Testing Database Network Systems 52

SQL Performance

MAY 29, 2019

From SQL Server 2016 onward, FastLoadContext is enabled by default ; the trace flag is not required. For more background, see the Data Performance Loading Guide and the Tiger Team notes on the behaviour changes for SQL Server 2016. FastLoadContext can be disabled on SQL Server 2016 using documented trace flag 692. I >= 100.

Cache 64

Cache Testing Servers Code 64

SQL Performance

APRIL 8, 2019

Back on December 5, 2017, Microsoft announced that they were using AMD EPYC 7551 processors in their storage-optimized Lv2-Series virtual machines. Both of these Intel processors are special bespoke models that are not in the Intel ARK database. They feature low latency, local NVMe storage that can directly leverage the 128 PCIe 3.0

Azure 42

Azure Virtualization Storage Benchmarking 42

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

MAY 1, 2019

The summary rows for heap tables without indexes are the same in both documents (no changes for SQL Server 2016): An explicit TABLOCK hint is not the only way to meet the requirement for table-level locking. The following demo script should be run on a development instance in a new test database set to use the SIMPLE recovery model.

Servers 47

Servers Database Testing Performance 47

SQL Performance

APRIL 23, 2019

SQL Server 2016 introduced serial batch mode processing and aggregate pushdown. Columnstore storage. To understand this, it is necessary to first review how columnstore storage works at a high level: A compressed row group contains a column segment for each column. to give {11, 12, 13}, then rebasing at 11 to give {0, 1, 2}.

Servers 67

Servers Testing Metrics Storage 67

SQL Performance

MAY 16, 2019

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. The calculated row size (61 bytes) differs from the true row storage size (60 bytes) by the extra one byte of internal metadata present in the insert stream.

Cache 67

Cache Servers Testing Storage 67

Particular Software

OCTOBER 3, 2017

This article was originally published on the NDC 2016 Blog. It turned out that an RPC call to a legacy service, whose response value was stored in the 72nd column in the database table, wasn't even necessary. Because you're on the outside of the monolith, your database technology constraints also disappear.

Architecture 49

Architecture Database Code Systems 49

Brendan Gregg

NOVEMBER 28, 2017

In this configuration, the AMI and boot is paravirt (PV), the kernel is making hypercalls instead of privileged instructions, and the system is using paravirt network and storage drivers. But not all workloads: some are network bound (proxies) and storage bound (databases). ## 5. The AMI and boot are now HVM.

Virtualization 40

Virtualization AWS Hardware Storage 40

Smashing Magazine

JANUARY 15, 2019

The Green Web Foundation maintains an ever-growing database of web hosts who are either wholly powered by renewable energy or are at least committed to being carbon neutral. An obvious metric here is CPU usage, but memory usage and other forms of data storage also play their part. These include data transfer (i.e.

Website Performance 78

Website Performance Website Energy Performance 78

Alex Russell

APRIL 29, 2021

At the time of the last Confluence run, the gap had stretched to nearly 1000 APIs, doubling since 2016. Chrome has missed several APIs for 3+ years: Storage Access API. The data captured by MDN Browser Compatibility Data Respository and the caniuse database is often partial and sometimes incorrect. Where Chrome Has Lagged.

Media 145

Media Games Education Engineering 145

SQL Server According to Bob

DECEMBER 18, 2018

Durability: “In database systems , durability is the ACID property which guarantees transactions that have committed will survive permanently. Microsoft SQL Server Database Engine Input/Output Requirements. Device level flushing may have an impact on your I/O caching, read ahead or other behaviors of the storage system.

Servers 90

Servers Media Cache Storage 90

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. Processed 4.15

Database 48

Database Analytics Blockchain Healthcare 48