TIDB6.5.0运行7天后系统不定时的全面卡顿

%Cpu(s): 14.7 us, 3.0 sy, 0.0 ni, 79.5 id, 0.4 wa, 0.8 hi, 1.6 si, 0.0 st
MiB Mem : 62456.0 total, 6171.3 free, 41895.9 used, 14388.8 buff/cache
MiB Swap: 0.0 total, 0.0 free, 0.0 used. 12970.5 avail Mem

%Cpu(s): 9.9 us, 2.3 sy, 0.0 ni, 84.2 id, 0.7 wa, 1.0 hi, 1.9 si, 0.0 st
MiB Mem : 62010.6 total, 4229.6 free, 47955.8 used, 9825.2 buff/cache
MiB Swap: 0.0 total, 0.0 free, 0.0 used. 5475.9 avail Mem

%Cpu(s): 10.8 us, 2.0 sy, 0.0 ni, 84.0 id, 0.9 wa, 0.7 hi, 1.6 si, 0.0 st
MiB Mem : 62456.1 total, 6707.9 free, 39906.3 used, 15841.9 buff/cache
MiB Swap: 0.0 total, 0.0 free, 0.0 used. 14728.4 avail Mem

avg-cpu: %user %nice %system %iowait %steal %idle
7.78 0.00 3.65 1.32 0.00 87.26

Device tps kB_read/s kB_wrtn/s kB_dscd/s kB_read kB_wrtn kB_dscd
dm-0 169.43 652.69 16338.08 0.00 230389452 5767077836 0
dm-1 0.00 0.01 0.00 0.00 3264 0 0
dm-2 0.00 0.00 0.00 0.00 1536 0 0
loop0 0.02 9.47 0.00 0.00 3342534 0 0
sda 164.46 668.51 16338.15 0.00 235972763 5767103709 0

avg-cpu: %user %nice %system %iowait %steal %idle
11.96 0.00 6.64 0.80 0.00 80.60

Device tps kB_read/s kB_wrtn/s kB_dscd/s kB_read kB_wrtn kB_dscd
dm-0 125.17 333.36 13597.69 0.00 124008484 5058228792 0
dm-1 0.00 0.01 0.00 0.00 3072 0 0
dm-2 0.00 0.00 0.00 0.00 1344 0 0
sda 122.02 333.51 13597.76 0.00 124063621 5058254556 0

avg-cpu: %user %nice %system %iowait %steal %idle
12.06 0.00 4.70 0.77 0.00 82.47

Device tps kB_read/s kB_wrtn/s kB_dscd/s kB_read kB_wrtn kB_dscd
dm-0 126.31 291.85 13396.25 0.00 108540900 4982185168 0
dm-1 0.00 0.01 0.00 0.00 3072 0 0
dm-2 0.00 0.00 0.00 0.00 1344 0 0
sda 123.82 292.00 13396.32 0.00 108595757 4982210920 0