# File Read Latency
```sh
** Level 0 read latency histogram (micros):
Count: 696 Average: 489.8118 StdDev: 222.40
Min: 3.0000 Median: 452.3077 Max: 1896.0000
Percentiles: P50: 452.31 P75: 641.30 P99: 1068.00 P99.9: 1860.80 P99.99: 1896.00
------------------------------------------------------
[ 2, 3 ) 1 0.144% 0.144%
[ 18, 20 ) 1 0.144% 0.287%
[ 45, 50 ) 5 0.718% 1.006%
[ 50, 60 ) 26 3.736% 4.741%
```
- 包含了读取 data blocks、index blocks 和 bloom filter blocks 的统计