Jake, Have you reviewed the sizes for TIOT in the Init and Tuning Manual?
TIOT Specifies the installation defaults for the task I/O table (TIOT). SIZE(nn) Specifies the size of the TIOT. The TIOT contains an entry for each DD statement. The size of the TIOT controls how many DDs are allowed per jobstep. By specifying an integer from 16 to 64 as the value of this parameter, the installation controls the default DD allowance. Table 1 shows the relationship between the size of the TIOT and the maximum number of DDs allowed. Table 1. Relationship size of TIOT and maximum number of DDs allowed Dec Hex Size of TIOT Maximum number of Maximum number of DDs allowed when every single unit DD Allowed DD requests the maximum number of units (59) 16 10 16384 (16K) 816 64 17 11 17408 (17K) 867 68 24 18 24576 (24K) 1225 97 25 19 25600 (25K) 1277 101 32 20 32768 (32K) 1635 129 40 28 40960 (40K) 2045 162 48 30 49152 (48K) 2454 194 56 38 57344 (56K) 2864 227 64 40 65536 (64K) 3273 259 It looks better in this link https://www.ibm.com/support/knowledgecenter/SSLTBW_2.1.0/com.ibm.zos.v2r1.ieae200/alstate.htm There are some examples to show you how things are calculated. But remember, YMMV. Also, if you do any internet searches, you will probably come across this link https://groups.google.com/forum/#!topic/bit.listserv.ibm-main/5iizAoUCURc Lizette > -----Original Message----- > From: Lizette Koehler [mailto:stars...@mindspring.com] > Sent: Tuesday, June 21, 2016 6:26 AM > To: 'IBM Mainframe Discussion List' <IBM-MAIN@LISTSERV.UA.EDU> > Subject: RE: TIOT exceeded > > If you did not set the TIOT in ALLOCxx to the max (64K) then you will probably > run out of TIOT sooner than someone who does. > > > > If you have SDSF, check the Health Checker function - Look for TIOT in the > list. See what it says. > > You can enter SB next to the HC functions for more details. > > It might help. > > I would just expect the system to calculate things for TIOT correctly. If you > feel this is in error, you should open an SR with IBM and have them assist > you. They will probably need dumps or traces to determine why it fails. > > Lizette > > > > -----Original Message----- > > From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] > > On Behalf Of Jake Anderson > > Sent: Monday, June 20, 2016 10:43 PM > > To: IBM-MAIN@LISTSERV.UA.EDU > > Subject: Re: TIOT exceeded > > > > Hi Lizette > > > > Apology to ask > > > > I am not still able to understand the calculation of TIOT usage in my case. > > > > It was just 1027 GDG members spanning across multiple volume. > > > > So how did it exhaust the TIOT ? Is there a formula that would help me > > to determine? > > > > Jake > > On Jun 21, 2016 3:23 AM, "Lizette Koehler" <stars...@mindspring.com> wrote: > > > > > Why not run with TIOT set to 64K? I know a lot of shops that have > > > set that to the maximum of 64K > > > > > > Lizette > > > > > > ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN