multi-core performance

MySQL On Multi-Core Machines

The DevShed technical tour explains that MySQL can spawn new threads, each of which can execute on a different processor/core. What it doesn’t say is that a single thread can only execute on a single core, and if that thread locks a table, then no other threads that need that table can execute until the locking thread/query is complete. Short answer: MySQL works well on multi-core machines until you lock a table.