Fixed an issue where CPU usage was very high on Windows when opening the psql tool. #8864

web/pgadmin/tools/psql/__init__.py

@@ -235,7 +235,7 @@ def read_stdout(process, sid, max_read_bytes, win_emit_output=True):
                       'error': False},
                      namespace='/pty', room=sid)
 
-    sio.sleep(0)
+    sio.sleep(0.01)
 
 
 def windows_platform(connection_data, sid, max_read_bytes, server_id):
@@ -246,10 +246,11 @@ def windows_platform(connection_data, sid, max_read_bytes, server_id):
     process.write("\r\n")
     app.config['sessions'][request.sid] = process
     pdata[request.sid] = process
+    cdata[request.sid] = process.fd
     open_psql_connections[request.sid] = server_id
     set_term_size(process, 50, 50)
 
-    while True:
+    while process.isalive():
         read_stdout(process, sid, max_read_bytes,
                     win_emit_output=True)