On October 21, 2026, it was announced that there were two "emergency" level vulnerabilities in PHP, and patched versions were ...

The theme for this session is database "indexes".Indexes are one of the technologies you absolutely must understand when ...

当幻读发生时，日志中会出现类似 WAITING FOR THIS LOCK TO BE GRANTED: RECORD LOCKS space id 123 page no 456 n bits 72 index PRIMARY of table test.winners trx id 123456789 lock_mode X insert intention waiting 的记录——注意 ...

It was supposed to be a standard, run-of-the-mill maintenance task—the kind of routine database housekeeping that backend engineers perform dozens of times a month without a second thought. A small ...