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SAP Client Server Technology Supporting Information

When performing system administration, the more accurate technical information you find, the more likely you are to solve the issue quickly.

In this post document, you will get to know a compilation and an overview of important information (such as links to SCN documents, guides, SAP Notes) for dealing with kernel related tasks. The same content is provided to customers once they download one or more files that are part of the SAP “Kernel”.

We appreciate your feedback about the content to see if it is really working to speed up implementation and issue resolution, as well as other relevant comments or suggestions you may have.


  SAP Kernel Patching


Our recommendation is having the latest stack kernel patch level. The white paper
"Deployment Strategies for the kernel of the SAP application server ABAP” referred on SAP Note 19466 suggest to only install dw patches if a newer kernel patch is needed, read more »

  SAP Kernel Known Regressions


For each kernel patch there is a regression note, which lists all the known newly introduced errors by this patch level. Find it using the keyword KRNLxxxPLyyy in the SAP note search.
For example, KRNL721PL500.

Troubleshooting Netweaver Application Server issues

Tools

Details

Decision tree

Roadmap of troubleshooting steps

DPMON Dispatcher Monitor

OS level monitoring tool

/SDF/MON

Report to collect snapshots of monitoring details

Developer traces

How find and download developer trace files

CORE dump file

Extracting the c-stack from a program's core dump file

Dispatcher and Taskhandler

Details

7.4X parameter check feature

Identify wrong parameters

Application Server load information control

When a resource is temporarily deactivated

Parameters based in hardware resources

Arithmetical calculation per HW resource

Snapshots in the SAP System

Comprehend developer trace information

Dynamic work processes configuration

Adjusting WP resources based on server load

CCMS infrastructure

Monitoring Work Processes

FAQ

Application server administration

Enqueue

Details

How to change trace level dynamically

Control its trace level without downtime

Enqueue overload

Analyzing the log information

Remaininig locks

What to do when locks are not released

Session quota

Quotas per user session

Failover in ASCS with ERS

Checking the switchover functionality

Effect on TCP connection usage

Resource and consumption of client handles

FAQ

Understanding the enqueue lock mechanism

Gateway

Details

Gateway Access Control Lists

Complying with the SAP gateway security recommendations

Emergency situations

Disabling gateway security

Troubleshoot security settings

reg_info / sec_info

Extra info on SAP note 1444282

How the parameter gw/reg_no_conn_info works

Managing standalone gateway

ABAP program to manage a gateway running on ASCS

RFC trace too big

Identifying RFC destination with trace enabled

ICM and Web Dispatcher

Details

HTTP(s) sizing for SAP NetWeaver

MPI settings for the ICM/Web Dispatcher

Enhance HTTP(s) package analyses

Enable HTTP headers to be logged in trace file

Dynamic change of profile parameters

Modifying Web Dispatcher parameters with wdispmon

Managing PSE files at the Web Dispatcher

Managing PSE files through the Web Administration page

Icmon and wdispmon

Concept of wdispmon and icmon tools

User access to web admin page

User administration

Web Dispatcher Installation

Steps of SWPM tool (former sapinst)

Load balancing

Checking if the requests are even distributed

SSO for HANA XS admin page

SSO (Single Sign On) to access admin page

Web Dispatcher for Multiple Systems

Understanding and how to configure examples

FAQ

Configuration and functionality

Memory Management

Details

TSV_TNEW_PAGE_ALLOC_FAILED

Guide to analyze memory resources consumption

Memory Dumps as of Kernel Release 7.4x

Meaning of a classic memory dump

Shared Memory Pools as of Kernel 7.4x

Concept of pools 10 and 40

Memory leak

Investigate high memory allocation

EG memory area

Parameters for extend global memory

FAQ

Identifying the owner of a shared key

Startup Framework

Details

Step-by-step guide

Troubleshooting the phases of a system initialization

Instance status

Application Server state reported by sapstartsrv

Incompatible kernel

Mismatched kernel between instances

Missing files

FAIL: sapstart not found

Web methods

Difference between DEFAULT and SDEFAULT

Sapstart functions for HA interface

Stop/Restart_Program_<XX>

System shutdown by signal 2

Normal signal termination from outside SAP

START_CALL_SICK

Connection problems to message server

Sapstartsrv service parameters

Detailing service/<parameter> options

Libraries dependencies

Referenced/runtime symbol definition not found

FAQ

Sapstartsrv version and command history

Others

Details

ABAP Load Balancing

SAPgui, HTTP and RFC load balance

Update Server Group

Update system configuration and concepts

ICMBND

Message Server configuration

FAQ Message Server

Control the HTTP(s) access - ms/permission_table

Saprouter

Service configuration a Windows 32bit server

FAQ Network Interface

Network features

Number Range Buffer

Error messages and resolution

License cannot be installed

Problem with new installation number

FAQ License

Why does the license installation fail?

  SAP Kernel Important News


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