#disk-io

How-to: What program in Linux can measure I/O over time? #fix #computers #it

What program in Linux can measure I/O over time?

I’m trying to measure the total amount of disk writing and reading that is done to a particular volume by a particular process over a specified duration.

I’ve found iotop, which can output IO every second for a particular process like this:

iotop batch pid $(pidof my_process)

Where you can specify x iterations with -n x.

But then I have to filter…

Solution: Is there a way to get Cache Hit/Miss ratios for block devices in Linux? #solution #answer #dev

Is there a way to get Cache Hit/Miss ratios for block devices in Linux?

Is it possible to see in Linux how many read and write requests from user space end up causing cache hits and misses for block devices?

Answer [by BMDan]: Is there a way to get Cache Hit/Miss ratios for block devices in Linux?

/proc/slabinfo is a good start, but doesn’t give you quite the information you’re looking for…

How-to: Find the bottleneck: disk I/O on Windows XP #dev #development #solution

Find the bottleneck: disk I/O on Windows XP

One of our development boxes has developed a problem wherein performance will occasionally drop through the floor. When this happens, you can hear the hard drive thrashing, but I don’t know what’s causing it.

This happens during periods of high disk access (reading/writing multi-gigabyte files), but not every time nor for the entire period of disk…

Solution: Is there a way to get Cache Hit/Miss ratios for block devices in Linux? #programming #solution #answer

Is there a way to get Cache Hit/Miss ratios for block devices in Linux?

Is it possible to see in Linux how many read and write requests from user space end up causing cache hits and misses for block devices?

Answer [by BMDan]: Is there a way to get Cache Hit/Miss ratios for block devices in Linux?

/proc/slabinfo is a good start, but doesn’t give you quite the information you’re looking for…

Solution: Find the bottleneck: disk I/O on Windows XP #fix #dev #solution

Find the bottleneck: disk I/O on Windows XP

One of our development boxes has developed a problem wherein performance will occasionally drop through the floor. When this happens, you can hear the hard drive thrashing, but I don’t know what’s causing it.

This happens during periods of high disk access (reading/writing multi-gigabyte files), but not every time nor for the entire period of disk…