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When Do SQL Server Sorts Rewind?

SQL Performance

Its raison d’être is to cache result rows from a plan subtree, then replay those rows on subsequent iterations if any correlated loop parameters are unchanged. Table-valued functions use a table variable, which can be used to cache and replay results in suitable circumstances. Spools are the least costly way to cache partial results.

Servers 106
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Impact of Querying Table Information From information_schema

Percona

On MySQL and Percona Server for MySQL , there is a schema called information_schema (I_S) which provides information about database tables, views, indexes, and more. The same tests have been executed in Percona Server for MySQL 5.7 Results for Percona Server for MySQL 5.7 Results for Percona Server for MySQL 5.7

Cache 109
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How to Install or Upgrade Percona Server for MySQL/MySQL 8 to a Specific Version on Debian/Ubuntu

Percona

Sometimes we might need to install/upgrade Percona Server for MySQL /MySQL 8 to a particular version in a test or production environment. Install Percona Server for MySQL 8 specific version packages via repository. Download specific Percona Server for MySQL 8 tarball packages and install them manually. bullseye amd64 1.7

Servers 88
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Percona Toolkit – A Quick Introduction to Summary

Percona

Percona Toolkit is a collection of advanced open source command-line tools, developed and used by the Percona technical staff, that are engineered to perform a variety of MySQL, MariaDB, MongoDB, and PostgreSQL server and system tasks that are too difficult or complex to perform manually. Caches | 12.4G Caches | 12.4G

Cache 106
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Azure Well-Architected Framework: What it is and how to tame it with AI and automation

Dynatrace

Missing caching layers. Figure 5 – Dynatrace measures over 2000 different metrics ready for use as dedicated SLIs. Serverless – Deploy OneAgent via ARM templates or Site Extensions for Azure App Server or Azure Functions to get code level insights. Too much data requested from a database.

Azure 190
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High Memory Usage on ProxySQL Server

Percona

ProxySQL is a very useful tool for gaining high availability, load balancing, query routing, query caching, query rewriting, multiplexing, and data masking. There can be an instance of ProxySQL using a lot of memory on the server. This post is related to one of the causes that can use memory on the ProxySQL server and how we handle it.

Servers 60
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ChatGPT Won’t Replace MySQL DBA – An Example of a Question About Encryption at Rest

Percona

key id, key user, key type, together with keys themselves) into the cache, unless MySQL is restarted, or you want to rotate the master key (you won’t though, as you know you have removed the keyring_file), it will not need the keyring file anymore. 00000030: 0000 0000 0000 0000 2000 0000 0000 0000.

Database 123