
2020-4-30
1 , 42
1 ......................................................................................................................... 3
1.1 query ............................................................................................................... 3
.................................................................................................... 4
.................................................................................................... 4
guc ..................................................................................................... 5
SQL ................................................................................................... 5
1.2 ................................................................................................................. 5
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................................................................................................................ 8
2 ............................................................................................................................... 11
2.1 SQL ....................................................................................................... 11
2.2 ....................................................................................................................... 11
2.3 ....................................................................................................................... 12
top ........................................................................................................................ 12
iostat ..................................................................................................................... 16
3 ............................................................................................................................... 17
3.1 ....................................................................................................................... 17
...................................................................................................................... 17
...................................................................................................................... 18
3.2 ........................................................................................................................... 18
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