I am facing slowness issue on MySQL Slave. I am suspecting this due to OS I/O as i compared Spin rounds per wait values with PROD. Slave have higher values. Also slave has less resources compared to PROD.
OS WAIT ARRAY INFO: reservation count 572783, signal count 1796058 Mutex spin waits 15479300, rounds 12039758, OS waits 109005 RW-shared spins 618729, rounds 8406119, OS waits 254889 RW-excl spins 242434, rounds 7770788, OS waits 205984 Spin rounds per wait: 0.78 mutex, 13.59 RW-shared, 32.05 RW-excl