CSS pure HTTP default buffer size

[PETER BUZA]

Hi All,

Earlier we found that we can change the TCP buffer size (rx, tx) also for SSL and compressed HTTP connections in the CSS configuration, but not for pure HTTP connections. (relevant discussion: https://supportforums.cisco.com/message/3715362#3715362)

Do you know the default TCP buffer size for pure HTTP?

Thank you in advance.

BR,
Peter       

[Kanwaljeet Singh · Accepted solution]

Hi Peter,

From the below explanations, for rx it is 32768 and for tx it is 65536. You might also like to visit the below link for details:

http://www.cisco.com/en/US/docs/app_ntwk_services/data_center_app_services/css11500series/v8.10/configuration/ssl/guide/Compress.html#wp1059676

Configuring the TCP Buffering for TCP Connections

If the network is slow and congested, you can increase the buffer size that the CSS buffers for a given TCP connection before shutting down the TCP window to 0. Increasing the buffer size decreases latency on slow connections to a client but increases buffering in the CSS. Use this feature with caution, because if there are many slow clients, the CSS memory may run low.

Use the compress tcp buffer-share command in service configuration mode to set the TCP buffering from the client or server on a given TCP connection. The syntax for this command is:

compress tcp buffer-share [rx bytes|tx bytes]

The keywords and variables are:

•rx bytes - Sets the amount of data in bytes that a given connection can buffer from the client traffic. Enter a number from 16400 to 262144. By default, the buffer size is 32768.

•tx bytes - Sets the amount of data in bytes that a given connection can buffer from the server. Enter a number from 16400 to 262144. By default, the buffer size is 65536.

For example, to set the buffer size for client traffic to 65536 bytes, enter:

(config-service[server3])# compress tcp buffer-share rx 65536

To reset the buffer size for client traffic to the default of 32768, enter:

(config-service[server3])# no compress tcp buffer-share rx 

To set the buffer size for server traffic to 131072, enter:

(config-service[server3])# compress tcp buffer-share tx 131072

To reset the reset the buffer size for server traffic to the default of 65536, enter:

(config-service[server3])# no compress tcp buffer-share tx 

Regards,

Kanwal

[PETER BUZA]

Hello Kanwal,

Thanks a lot.

BR,
Peter