IBM Support

Windows 2012 R2 slow network performance in tcprecv

Troubleshooting


Problem

Slow network performance from tcprecv, may experience 0.5 second delay.

Symptom

DB2 client side trace will show 0.5 second delay in tcprecv which gets propagated up to SQLExecDirectW.

2726           0.486271858   SQLExecDirectW entry
2727           0.486291903   SQLExecDirectW mbt
2824           0.487910754   | SQLExecute2 entry
...
2890           0.494393072   | | | | | tcprecv entry
2891           0.975967685   | | | | | tcprecv data [probe 2]
2892           0.975978371   | | | | | tcprecv exit
...
2937           0.977433863   | SQLExecute2 exit
2945           0.977559438   SQLExecDirectW exit
   

[{"Product":{"code":"SSEPGG","label":"Db2 for Linux, UNIX and Windows"},"Business Unit":{"code":"BU058","label":"IBM Infrastructure w\/TPS"},"Component":"Connectivity - TCP\/IP Protocol","Platform":[{"code":"PF033","label":"Windows"}],"Version":"9.7;10.1;10.5","Edition":"","Line of Business":{"code":"LOB10","label":"Data and AI"}}]

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Document Information

Modified date:
30 April 2025

UID

swg21986901