siteInfo
The messagetracingmaxage=10
key in
siteInfo is used to prevent the tracing database
from growing indefinitely large.
This is the maximum age in days to keep tracing records in the tracing database. The engine automatically purges tracing records earlier than this age every time a process in the site is started, and every 24 hours thereafter.
A value of zero means that there is no maximum age, and the user must clean out the tracing database manually.
The siteInfo also contains the messagetracing=0
key. This enables tracing for the entire
site and save the user the trouble of turning it on for every individual thread in the
site. "0" indicates "off" and "1" indicates "on." The default to "0."
Tracing first checks this setting, the thread-level setting, and finally the message-level flag to determine if a message is to be traced.