bash - 检测 db2 死锁的脚本

Question

我正在尝试制作脚本，该脚本将检查自上次脚本运行以来是否创建了新的死锁，如果自上次运行以来没有新的死锁，则应打印 0 如果创建了新的死锁，则应打印数字

     #DB profile
     . /db2/tdb_inst/archinst/sqllib/db2profile;
     #variable to get current deadlock count
     a=`db2 get snapshot for all on archprd |grep Deadlock|head -1|awk '{print $4}'`
     #variable to get last deadlock count
     b=`cat /home/dbmon/script/darch`

     #need your help to do below math in script
     #  if a$-b$ = 0  print 0 if a$-b$ > 0 print number 

     #after print export current deadlock count to darch file
     echo $a > /home/dbmon/script/darch

TIA tnt5273

Answer 1

need your help to do below math in script

if a$-b$ = 0 print 0 if a$-b$ > 0 print number

你可以说:

(( a - b )) && echo $(( a - b )) || echo 0

如果a = b，则打印0，否则打印a - b。

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实际上，即使是以下内容也足够了:

echo $(( a - b ))