why my "fs_commit_latency" is so high ? is it normal ?

[duan.xufeng@xxxxxxxxxx]

[root@storage1 ~]# ceph osd perf
osdid fs_commit_latency(ms) fs_apply_latency(ms)

    0      
            149        
          52 
    1      
            201        
          61 
    2      
            176        
         166 
    3      
            240        
          57 
    4      
            219        
          49 
    5      
            167        
          56 
    6      
            201        
          54 
    7      
            175        
         188 
    8      
            192        
         124 
    9      
            367        
         193 
   10      
            343        
         160 
   11      
            183        
         110 
   12      
            158        
         143 
   13      
            267        
         147 
   14      
            150        
         155 
   15      
            159        
          54 

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