Bootup takes very long time
I am running SLES15 SP2 on my host. And I am getting NVMe devices as a storage from a SAN box. When I have very less devices (<50) I see the bootup time is reasonable to < 1m. But as I increase the devices (>1000), the bootup time increases significantly. I see that upon configuring about 6000 devices, the bootup time is about 21m, and on reaching 8000 devices, it goes uptill 33 minutes. I checked systemd-analyze blame, and I see the most time taking service is lvm2-monitor. But I couldn't figure out why it is taking time. Moreover, dev-ttyS0 times out.
Any clue on how can I speed up the bootup time.
Attaching the bootup logs with 6000 devices.