QAD QAD QXtend 1.8.7 > Install Guide > Troubleshooting QAD QXtend Installs, Upgrades, and Migrations > Environment Issues and Common Mistakes > UI API Adapter Performance
  
UI API Adapter Performance
When using QXtend with AIX, change the AIX kernel setting tcp_nodelayack to 0. Otherwise, QXtend UI API performance is severely limited.