IBM i PTF Guide, Volume 28, Number 11

March 16, 2026 Doug Bidwell

The Power11 processors and their systems have in the field since last summer, and for those of you fortunate enough to have a server with that “new car smell,” now is the time to learn about the new processor and systems and figure out how to optimize performance on these machines and take advantage of their special features.

To that end, IBM has put out a new best practices guide called IBM Power11 Performance Optimization For IBM i to help you begin the processor of tuning up your new machine. You can download it here.

In addition to this, there are some issues with Java you need to be aware of, and luckily IBM has some fixes out for them, too. Specifically, the issue is: IBM i Java Development Kit 8 64 & 32 bit VMs Fail with “Could not generate ECDHEMLKEM keypair” After IBM i Java Group PTF Apply, which you can read more about here.

The affected IBM i Java Group PTF Levels Providing Java 8 SR8 FP55 are as follows:

IBM i 7.6: SF99965 level 4
IBM i 7.5: SF99955 level 19
IBM i 7.4: SF99665 level 31
IBM i 7.3: SF99725 level 40

These are the current Java Groups for each release. Read the details at the link for work arounds and some PTF for more information. Other IBM JDK versions (11, 17, 21) on IBM i are not affected – only Java 8 (64-bit and 32-bit) VMs. This issue can also affect the IBM i Administration (ADMIN) server, Integrated Web Services (IWS), Integrated Web Application Server (IAS), WebSphere Application Server (Traditional and Liberty), Tomcat, and Web Query instances running on Java 8 SR8 FP55.

Here is the rundown of PTF Groups by IBM i release level since we last published:

PTF Groups 7.6:

QMGTOOLS
Rational Developer for i
RPG Café

PTF Groups 7.5:

QMGTOOLS
Rational Developer for i
RPG Café

PTF Groups 7.4:

QMGTOOLS
Rational Developer for i
RPG Café

PTF Groups 7.3:

QMGTOOLS
Rational Developer for i
RPG Café

PTF Groups 7.2:

None

Tip O’ The Week: The last two digits of the Win App ACS download is the Version of the ODBC driver. See the link in the ACS_NAV Tab!

New (or Updated) links added to the ‘Links’ tab in The Guide this week:

JAVA: Download, Installation, and Usage of Java 21 on the IBM i OS, 7231371

New (or Updated) links added to the ‘QMGtools’ tab in The Guide this week:

None

New (or Updated) links added to the ‘ACS_NAV’ tab in The Guide this week:

None

New (or Updated) links added to the ‘Prtr Links’ tab in The Guide this week:

None

New (or Updated) links Redbooks added this week:

None

New (or Updated) stuff added to REF tab in The Guide this week:

None

New (or Updated) links in the TAPE tab in The Guide this week:

None

New (or Updated) links in the WAS tab in The Guide this week:

None

The Guide at a glance: There were new defectives the week of 03/14/26. Defective PTF rundown – the latest defective for each release. Click on the Defective PTF link for your release in the Guide:

	Defect	     Defective	APAR		Fixing
	Date	     PTF				PTF
	--------     --------	---------	-----------------------	
7.6	12/09/25     MJ07438	DT457460	MJ08280	(When available)(read the recommendations)
							Read the cover letter-prerequisites!			
7.5	01/15/26     SJ08112	DT460154	xxxxxxx (When available)(read the recommendations)
				 			Read the cover letter-prerequisites!                   	
						 
7.4	09/11/25     MJ06247	DT450137	MJ07181	Same as above, Please read the Cover letter - 
							(When available)(read the recommendations)
							Read the cover letter-prerequisites!
7.3	01/27/25     SJ03169	DT422375	SJ03786 (When available)(read the recommendations)

Be sure to access the link in The Guide for further details.

Below is the usual archive of the IBM i PTF Guide to help you work through the PTFs in chronological order:

March 14, 2026: Volume 28, Number 11

March 7, 2026: Volume 28, Number 10

February 28, 2026: Volume 28, Number 09

February 21, 2026: Volume 28, Number 08

February 14, 2026: Volume 28, Number 07

February 7, 2026: Volume 28, Number 06

January 31, 2026: Volume 28, Number 05

January 24, 2026: Volume 28, Number 04

January 17, 2026: Volume 28, Number 03

January 10, 2026: Volume 28, Number 02