Locking Theory and Monitoring
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When locks show their worst side, they can cause gray hairs for even the best expert on locks. However, do not despair. This chapter will introduce you to most of the knowledge of locks you will need – and possibly some more. After you have read this chapter, you should be able to start investigating locks and use that to gain further knowledge. The chapter starts out discussing why locks are needed and the lock access levels. The largest section of the chapter then goes through the most commonly encountered locks in MySQL. The other half of the chapter discusses why lock requests may fail, how to reduce the impact of locks, and how to monitor locks.