This guide explains how to install and use Perfetto, Android’s next‑generation tracing tool, covering trace capture via command line or Traceur, UI navigation, key trace elements, and practical SQL queries for analyzing slices, counters, scheduling, thread states, and lock contention to optimize performance.
An extensive collection of SQL Server commands, queries, and administrative procedures covering database creation, table manipulation, indexing, backup, security, replication, and performance tuning, presented with code examples and practical tips for developers and DBAs seeking a handy reference guide.
This comprehensive guide covers SQL Server basics such as logging in, creating and dropping databases, tables, indexes and views, advanced query techniques like UNION, outer joins and pagination, plus maintenance tasks, backup and restore, linked‑server data transfer, replication setup, and useful scripts for database administration.
This tutorial demonstrates how to create a MySQL database and table, import data from /etc/passwd, add an auto‑increment primary key, export selected records to a file, and perform common SQL queries, conditions, and table‑record manipulations such as insert, update, and delete.
By adding a lightweight diagnostic box that displays each page’s database query count and total execution time, developers can quickly spot inefficient queries, compare development and production performance, and make informed optimizations, ultimately improving website speed and reliability.
