We need to gather (a) the list of installed packages, (b) the list of packages that need to be upgraded. However, we have a design requirement to gather this frequently (every 5 minutes).
How can we gather this information and be as unobtrusive as possible? i.e. not use a lot of CPU, get in the way of others, etc.
We've experimented with running "yum list installed -q" and "yum list check-updates -q". However we find that sometimes they run for a long time (longer than 5 minutes). In that case, we want cleanly be able to kill them. (We'd rather not collect a value for that 5-minute interval rather than cause problems). Our experiments with sending SIGINT left a lot of transaction files around, which indicates to us that we should be doing something different.
Suggestions?
Tom
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