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username: When deploying TiFlash on a hardware platform with the Linux AMD64 architecture, the CPU must support the AVX2 instruction set. Ensure that the command cat /proc/cpuinfo | grep avx2 has output. When deploying TiFlash on a hardware platform with the Linux ARM64 architecture, the CPU must support the ARMv8 architecture. Ensure that the command cat /proc/cpuinfo | grep 'crc32' | grep 'asimd' has output. By using vector extension instruction sets, TiFlash’s vectorized engine can provide better performance.