David Lang wrote:
If I am understanding the data you posted, it looks like you are
useing sched_yield extensivly in your database.
Yes, I've seen problems in the past with workloads that use sched_yield
heavily.
But bear in mind, the ~2700 sched_yields shown in the schedstats
occurred over a 9 minute period.
That means that sched_yield is being called at a rate of around 5 per
second -- this is not a heavy user of sched_yield.
To put this into a broader perspective, this workload has around 270
tasks, and the context switch rate is around
45,000 per second.
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