Blog entries are related to the mainframe operating system z/VSE. Ingolf will share news, hints & tips or any topic. The postings on this site are my own and don't necessarily represent IBM's positions, strategies or opinions.
This is a reminder: If you plan to migrate to z/VSE 5.2 and did not yet order the z/VSE 5.2 product, you should order it before March 13, 2017. This is the z/VSE 5.2 end of marketing date. It is not possible to order z/VSE 5.2 after that. We also announced the end of service for z/VSE 5.2, which is October 31, 2018. See my corresponding blog entry - here . Therefore I recommend to migrate to z/VSE 6.1.
Today I have another z/VM APAR, that may reduce the system overhead for z/VSE guests, e.g. if you upgraded from the z/VM 6.3 1501 to the 1601 service level. The z/VM 6.3 1601 service level is required for z13s. z/VM APAR VM65998 : POLLING TOO FREQUENT WHEN CRYPTO IS INACTIVE Error description: VM65716 altered the limits for frequency of polling for CRYPTO activity. The maximum polling interval allowed was decreased resulting in more frequent polling and higher system overhead when there is little to no CRYPTO activity. I won't... [More]