The following tunables are used in the HP SPECweb99_SSL submittals,
beginning in July, 2002.

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Zeus global parameter tunables:

Below are the descriptions and default values for the parameters
used in HP's global.cfg file.

                    Tunable/Description                     Default Value
                    -------------------                     -------------
tuning!bind_any                                                  yes
    Boolean: have server sockets bind to IPADDR_ANY       

tuning!cache_cooling_time                                        120
    Zeus imposed delay before caching recently modified 
    files starts (seconds)                               

tuning!cache_files                                              8011
    Size of the web server file cache (number of files)   

tuning!cache_flush_interval                                      120
    Time after which unaccessed files are flushed from
    the cache (seconds)                                   

tuning!cache_large_file                                      1048577
    Minimum size of a "large" file (bytes)                

tuning!cache_max_bytes                                      33554432
    Maximum size to reserve for cached files (bytes) 
    (0=nolimit)                                           

tuning!cache_small_file                                         4096 
    Maximum size of a "small"file (bytes) (system 
    page size)                                            

tuning!cache_stat_expire                                          17
    Time for which the response of a stat() call 
    is cached (seconds)                                   

tuning!cbuff_size                                               8192 
    Integer: Cbuff size                                   

tuning!keepalive_timeout                                          15 
    Time after which an inactive keepalive connections 
    will be closed (seconds)                              

tuning!keepalive_max                                             256 
    Maximum permitted number of keepalive connections 
    (-1 means no limit)                                   

tuning!listen_queue_size                                         256
    Size of the TCP listen queue                          

tuning!maxaccept                                                  32
    Maximum number of accept() calls per server socket 
    per poll()/select()                                   

tuning!ssl_keepalive                                             yes
    Keepalive SSL connections
    (Used to default to "no")                           

tuning!ssl_sessioncache_size                                     199
    Size of SSL session cache                            

tuning!ssl_diskcache                              yes if tuning!num_children=1
    Boolean: use 2nd level on-disk cache for       no if tuning!num_children>1
    storing SSL session information                      

tuning!softservers                                               yes
    Decide which soft server a request should go to      

tuning!so_rbuff_size                                         <unset> 
    Size of the server socket buffer (so_rbuff_size) 
    (bytes)                                              

tuning!so_wbuff_size                                         <unset>
    Size of the socket write buffer (bytes)              

tuning!timeout                                                   120
    Timeout for client transfers (seconds)              

tuning!unique_bind                                                no
   Force each child process to bind to a unique IP 
   address, and not to each interface                   

tuning!use_poll                                                  yes
   Boolean: use poll() instead of select()               
 
tuning!modules!cgi!cbuff_size                                   8192
   Integer: cbuff size                                  

tuning!modules!security!enabled                                   no
   Boolean: Enable SSL         

tuning!modules!stats!enabled                                     yes
   Boolean: Enable the satistics module                  

tuning!modules!isapi!enabled                                      no 
   Boolean: Enable the ISPAI module                      

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The networking tunables used are the following.  The file
modified is /etc/rc.config.d/nddconf.

tcp_xmit_hiwater_def:  Amount of unsent data that triggers write-side
                       flow control.

        minimum: 4096
        maximum: undefined
        default: 32768 (32K)

tcp_conn_request_max:  Maximum number of outstanding inbound connection
                       requests.

        minimum: 1
        maximum: undefined
        default: 20

tcp_conn_strategy:  Should TCP connection establishment and teardown
                    optimize for space (value 0) or time (value 1).

        default: 0

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