Mysql Kill A Query Online

SHOW PROCESSLIST; The output flooded her screen. Dozens of connections. Most were sleeping. But one caught her eye:

Almost six minutes. That single query was hogging the CPU, locking critical rows, and starving the checkout service. mysql kill a query

She quickly checked the execution plan (EXPLAIN) — sure enough, no index on created_at and a full table scan on products with a wildcard LIKE . A perfect storm. SHOW PROCESSLIST; The output flooded her screen

She groggily opened her laptop, heart already racing. The company’s main e-commerce site was slowing to a crawl. Users couldn’t load their carts. But one caught her eye: Almost six minutes

KILL <connection_id>; -- kills the entire connection, not just the query She never forgot that 2 AM wakeup. And from then on, every SELECT on large tables had to justify its indexes in the design review. “With great SELECT comes great responsibility — and the ability to KILL QUERY when responsibility fails.”

KILL QUERY 19283; A second later, MySQL responded:

It was 2:13 AM on a Tuesday. Maya, the only on-call database engineer, jolted awake by a relentless buzz from her phone.