Use attributes on the Performance tab to tune the SGD server.
From the command line, use the Section D.16, “tarantella config list” command to list these settings, and the Section D.15, “tarantella config edit” command to edit these settings.
Usage: Type a number in the field.
The maximum number of requests the server processes simultaneously.
As a rough guide, set this to the number of CPUs multiplied by 4.
Too high a setting might degrade performance.
Changes to this attribute take effect immediately.
Command option:
--tuning-maxrequests
num
Usage: Replace
num
with the maximum number of
simultaneous requests.
The following example sets the maximum number of simultaneous requests to 7.
--tuning-maxrequests 7
Usage: Type a number in the field.
The maximum number of simultaneous user sessions. A user session is defined as a connection between an SGD Client and the SGD server.
Once the limit is reached, connections are refused.
Too high a setting might degrade performance.
Changes to this attribute take effect immediately.
Command option:
--tuning-maxconnections
num
Usage: Replace
num
with the maximum number of
simultaneous user sessions.
The following example sets the maximum number of simultaneous user sessions to 1000.
--tuning-maxconnections 1000
Usage: Type a number in the field.
The maximum number of open file descriptors allowed.
Increasing this value increases the number of simultaneous connections that can be handled.
This value affects all SGD server components.
Too high a setting might degrade performance.
Changes to this attribute take effect when the server restarts.
Command option:
--tuning-maxfiledescriptors
num
Usage: Replace
num
with the maximum number of open
file descriptors.
The following example sets the maximum number of open file descriptors to 4096.
--tuning-maxfiledescriptors 4096
Usage: Type numbers in the fields.
These attributes control the size and expansion rate of the memory allocated to the SGD server's Java Runtime Environment (JRE). The following attributes are available:
The amount of memory, in megabytes, to allocate initially for the SGD server's Java Virtual Machine (JVM). Set this to no greater than the amount of RAM on the host.
A scaling factor, expressed as a percentage, used to increase the amount of JVM software memory dynamically when needed.
An absolute maximum size in megabytes, that is never exceeded.
Too high a setting might degrade performance.
Changes to this attribute take effect when the server or JVM software restarts.
Command option:
--tuning-jvm-initial
MB
Usage: Replace
MB
with the initial memory allocation
for the JVM software, in megabytes.
Command option:
--tuning-jvm-scale
percent
Usage: Replace
percentage
with a dynamic scaling
factor, expressed as a percentage.
Command option:
--tuning-jvm-max
MB
Usage: Replace
MB
with the maximum memory allocation
for the JVM software, in megabytes.
The following examples set the initial JVM software size to 58 megabytes. The amount of JVM software memory can be scaled up to 150% when needed. The maximum JVM software size is set to 512 megabytes.
--tuning-jvm-initial 58 --tuning-jvm-scale 150 --tuning-jvm-max 512
Usage: Type a number in the field.
When to start resource synchronization each day, if enabled for the array.
Use the server's local time zone.
Express the time in 24-hour clock format. For example, use 16:00 for 4 p.m.
Changes to this attribute take effect immediately.
Command option:
--tuning-resourcesync-time
hh:mm
Usage: Replace
hh:mm
with the time, in 24-hour clock
format.
The following example sets the resource synchronization time to 4:00 (4 a.m.)
--tuning-resourcesync-time 4:00
Usage: Type the load balancing groups for this SGD server in the field.
This attribute is a string identifying the load balancing group for an SGD server in an array. This information can be used for application load balancing.
This attribute is used to enable optimal bandwidth usage. SGD servers are chosen from the same load balancing groups as application servers, where possible.
Leave this attribute blank unless your array spans a wide area network (WAN), or includes slow links, and you are using load balancing.
More than one string is allowed, but this slows application launch.
If used, set this attribute on all SGD servers in the array, and all application server objects in the organizational hierarchy.
Command option:
--server-location
location
Usage: Replace
location
with a string identifying
the load balancing group for the SGD server in the
array.
The following example specifies a location of boston.
--server-location boston