README - HP Systems Insight Manager 5.3 with Update 1
The HP SIM portal relies on the CMS to respond quickly to all requests.
• If the CMS is slow to respond to one request, browser performance may fall significantly during that
time.
• If the CMS is slow to respond to two requests, the browser appears to lock up completely during
subsequent interaction; the browser does not send additional requests until there are fewer than two
outstanding requests.
• If four sequential ping-like requests each takes more than 30 seconds to complete, due either to request
queuing or slow CMS response, the browser will display the message, Communication with the
HP SIM server has been lost, even though the CMS might still be responsive to other browser
sessions.
On a LAN, the browser receives a CMS response to most requests within 10-100 milliseconds, which is
nearly instantaneous. Requests that involve database queries or secondary network communication may take
a few seconds to respond.
There are situations that may result in particularly slow response times. For example:
• Viewing large collections of systems or events.
• Specific/custom database queries taking an unexpectedly long time.
• Many users simultaneously accessing a shared resource, such as the database.
Solution:
The maximum number of server connections can be increased in both Internet Explorer and Firefox.
The default number of connections is two. Though you can increase this number into the hundreds, it’s
recommended not to exceed ten. For more information, see:
• Internet Explorer: http://support.microsoft.com/kb/282402/
• Firefox: http://kb.mozillazine.org/Network.http.max-persistent-connections-per-server
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By default, web browsers are limited to two simultaneous connections to a single web server. If two requests
are outstanding, any additional requests wait until one of the current connections completes. This is by design
and is in agreement with the HTTP 1.1 specification. The HP SIM UI generates many requests, many of them
simultaneously. The HP SIM portal relies on the CMS to respond quickly to all requests. On a LAN, the
browser receives a CMS response to most requests within 10–100 milliseconds, which is nearly instantaneous.
Requests that involve database queries or secondary network communication may take a few seconds to
respond. The following situations might result in particularly slow response times:
• Viewing large collections of systems or events.
• Specific or custom database queries.
• Many users simultaneously accessing a shared resource, such as the database.
• Pages (for example, System Properties) that retrieve data using WBEM or SNMP and display the results,
especially when the requests are destined to time out.
To resolve this issue for the Microsoft Internet Explorer and Mozilla Firefox web browsers, increase the
maximum number of server connections to the web server. The default number of connections is two.
IMPORTANT:
For more information about increasing the number of server connections, see the following sources:
• Internet Explorer: http://support.microsoft.com/kb/282402/
• Firefox: http://kb.mozillazine.org/Network.http.max-persistent-connections-per-server
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When browsing to HP SIM using Microsoft Internet Explorer 6.0.3790.0 on Windows 2003, the billboard
in lower corner of the Home page is blank.
To correct this issue, enable Play Animations in Web Pages in Internet Explorer. To access this, select
Tools→Internet Options→Advanced, and then select Play Animations in Web Pages under the
Multimedia section.
12 Known Issues and Workarounds