HTTP Public Key Pinning Extension HPKP for Apache, NGINX and Lighttpd

https://raymii.org/s/articles/HTTP_Public_Key_Pinning_Extension_HPKP.html # Optionally load the headers module: LoadModule headers_module modules/mod_headers.so Header set Public-Key-Pins “pin-sha256=\”klO23nT2ehFDXCfx3eHTDRESMz3asj1muO+4aIdjiuY=\”; pin-sha256=\”633lt352PKRXbOwf4xSEa1M517scpD3l5f79xMD9r9Q=\”; max-age=2592000; includeSubDomains”

javax.net.ssl.SSLKeyException: RSA premaster secret error

http://www-01.ibm.com/support/docview.wss?uid=swg21625723 Cause The IBM SDK ships with strong but limited jurisdiction policy files. United States federal law places restrictions on the level of encryption that can be freely exported. The IBM SDK complies with these restrictions, which means it only supports SSL keys of 2048-bits or less. Many keys are now being created with larger…

WCM 8.5 Syndication troubleshooting

https://www.ibm.com/support/knowledgecenter/SSYJ99_8.5.0/wcm/wcm_syndication_troubleshooting.html Working with failed items From time to time items fail to syndicate. You use the failed items view to review a list of failed items and then run syndication again after you fix the issue. Log on to your syndicator as an administrator. Click the Administration menu icon. Then, click Portal Content > Syndicators.…

Java Garbage Collection: Best Practices for Sizing and Tuning the Java Heap (Chris Bailey)

http://www-01.ibm.com/support/docview.wss?uid=swg27013824&aid=1 Four GC “Policies”, optimized for different scenarios  -Xgcpolicy:optthruput   optimized for “batch” type applications  -Xgcpolicy:optavgpause optimized for applications withresponsiveness criteria  -Xgcpolicy:gencon optimized for highly transactionalworkloads  -Xgcpolicy:subpools optimized for large systems with allocationcontention  

JVM parameter “-Xmn” and recommendation for application with IBM JDK with Sterling Selling and Fulfillment Foundation

http://www-01.ibm.com/support/docview.wss?uid=swg21519763 What is the -Xmn parameter? Briefly, -Xmn decides the size of the young space in a JVM. When this parameter is not tuned, you may see some performance implications (for example, large spikes in the memory foot print). For more information on -Xmn, refer to Tuning performance > Tuning the application serving environment >…