Modify "write_wakeup_threshold" in RHEL 5.6

Dhabuwala, Nikhil NDhabuwala at
Tue Nov 27 18:39:27 GMT 2012

Our application makes a pretty heavy use of "random" and without the Key, we used to experience a significant performance bottleneck.
Even with the key, we see the "entropy_avail" is always pretty low. Running "watch -n 0.1 cat /proc/sys/kernel/random/entropy_avail" we see the numbers jump all over the place, generally staying in the 100s range,  reaching a max of 4096 and going as low as 128 (occasionally lower)

We modified the "write-wakeup_threshold" from 128 to 1024. Unfortunately, this does not seem to have made any difference.
Is there anything else we are missing?
We are running RHEL 5.7.
Any suggestions appreciated.


Nik Dhabuwala

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