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Cloned partion to new drive - IO Wait crushes server

I am running Ubuntu 9.10 and recently needed to upgrade the HD. I bought a 3TB 7200 64mb cache replacement drive. Created two partitions one at around 2gb the other for the remainder. The machine is ...
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2answers
503 views

Slow OSX - how to determine the bottleneck [duplicate]

I am using OSX 10.7.5 and my OSX is becoming a bit unresponsive, comparing to what it was like before. Sometimes just opening new window of browser or terminal takes few seconds or the Dock hovering ...
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1k views

How to fix very high w_await on linux desktop?

My Linux (Debian sid) desktop started to become sluggish in the last few weeks. When I investigated, I found that: There is no ram shortage -- the system regularly uses only half of its 4G, there is ...
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2k views

If “top” indicates CPU is spending 10% on %wa (iowait), does that mean the CPU is idle?

I am referring to the Linux top command. If it indicates 10.4% was spent on wa, does that mean 10.4% CPU was available for other processes? top - 09:40:45 up 178 days, 34 min, 1 user, load ...
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1answer
13k views

top says IOWAIT is high, how to I find the culprit processes

I know I should not do it but I run some Ubuntu system from an USB flash drive, in persistent mode, and it is painfully slow. "top" tells me it is not because of CPU, it is because of IO, ie high ...
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Ubuntu lucid, maverick high iowait

I'm using Ubuntu, and I've got the same problem with Lucid and Maverick. From time to time, especially a few minutes after boot, the iowait goes between 50-100% and the box is unusable. Everything ...