My god...thanks a lot!! I've done a small test:
1, First create a (vb,1024,27998,ps) data set on zos and write many records to it. All records with the same actual length: 8 so the data set is actually small. 2, Then I code a PL/I program to update first 40,000 records. The program runs for half an hour and the Excp Count is 416,084!!! 3, I code a similar cobol program to do the same thing with the same data set. It finishs in a minute and the Excp Count is only 38!!! So i think the problem is just what Robert said : QSAM and BSAM. Then I searched the net and got this link: http://www-1.ibm.com/support/docview.wss?uid=isg1PQ68269 IBM said it's a problem that 'VisualAge and Enterprise PL/I sometimes use BSAM for record I/O, while the older PL/I always used QSAM. This may cause problems for applications or products that assume record I/O will always be performed with QSAM.' We're using ADCD ZOS1.4 Summer and Enterprise PL/I for Z/OS V3.R1.M0(Built:20030401). So, what I should do? -- Best Regards, Johnny Luo ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
