After analysis, our cluster used compression, but did not use isal during
compression.
The compilation of ISAL compress in the current code depends on the macro
HAVE_NASM_X64_AVX2. However, the macro HAVE_NASM_X64_AVX2 has been removed,
resulting in the compression not using ISAL even if the compressor_zlib_isal
parameter is set to true.
At 2023-12-06 09:51:42, "Tony Yao" <yaoguo_...@163.com> wrote:
>Hi，
>
>
>Recently, I upgraded Ceph from 15.2.16 to 17.2.6, but I found that OSD CPU
>usage increased from 30% to 90% or more, and OSD subop_w_latency increased
>from 600us to 5ms. This is incredible.
>
>My hardware environment:
>
>12 nodes x 12 NVMe (Intel P4510 4T)
>
>I tried to set the OSD configuration to the default value and saw no
>improvement either.
>
>
>
>Have you ever encountered this problem？
>What might have gone wrong?
>
>
>Best regards,
>Tony Yao
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