Re: what is a reasonable socket select() wait time?

Thanks gentlemen.

Sometimes select() fails to detect when more data is truly available.  I'm
not sure why select() fails.  My client receive buffer size is huge; I know
the server never completely fills it.  I know the client sets the fd_set
bits correctly.

The server basically loops like this:

DO FOREVER;
  RC = READ( client );
  RC = WRITE( client );
ENDDO;

and the client basically talks like this:

RC = WRITE( server );
DOU X = 0;
  RC = READ( server );  // size available is huge
  X = SELECT( read_set, wait time=0 );
ENDDO;

If the server sends more than our CHGTCPA TCPRCVBUF(8192) value, the client
loops until X=0.  This works fine---99.9% of the time.  But about once
every thousandth time, select() fails to detect when more data is truly
available, and the DOU ends after one iteration with X=0.

Why does the select() periodically fail?  How can my client truly, TRULY
determine if more data is available from the server?  Do I need a non-zero
wait time?  What is a reasonable value?