Archive for the 'collectl' Category

It’s Your Choice: Collectl or Some Odd Collection of Sundry Commands

Some time back I made a blog entry about network performance monitoring tools with a slant towards monitoring Oracle over NFS. The blog entry contains a very long list of all the various tools out there, none of which did what I wanted.

That was then, this is now. Mark Seger (the author of collectl) commented as follows on that blog entry:

Sorry to hear you haven’t found any tools you like, but perhaps you haven’t looked at collectl yet.

Indeed I have looked into collectl. In fact, not only have I looked into it, but I absolutely love it and have been using it extensively for months. I recommend you take a gander at the collectl website.

In its simplest form, I feel it captures very good quick health check style information. The following is an example of a small Linux server performing a little over 200MB/s of disk and network throughput. As you can see, monitoring this sort of performance data would require several stock Linux commands.

# collectlwaiting for 1 second sample…#<——–CPU——–><———–Disks———–><———–Network———->#cpu sys inter ctxsw KBRead Reads KBWrit Writes netKBi pkt-in netKBo pkt-out

28 23 28325 57874 202880 562 0 0 5692 8414 227323 28862

29 25 28782 59234 222560 573 0 0 5616 8338 226129 28701

28 22 28333 57916 235776 634 2048 34 5517 8252 223717 28419

27 22 28874 58156 209848 597 1 1 5477 8162 222559 28290

28 23 28214 58068 220328 569 0 0 5620 8245 221651 28165

29 21 27871 57898 220224 582 0 0 5534 8213 225510 28606

28 24 27923 59021 223184 581 0 0 5536 8244 224676 28531

65 47 29300 57973 216152 580 316 16 5891 8364 226310 28725

Kudos, Mark. Great tool!


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I work for Amazon Web Services. The opinions I share in this blog are my own. I'm *not* communicating as a spokesperson for Amazon. In other words, I work at Amazon, but this is my own opinion.

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All content is © Kevin Closson and "Kevin Closson's Blog: Platforms, Databases, and Storage", 2006-2015. Unauthorized use and/or duplication of this material without express and written permission from this blog’s author and/or owner is strictly prohibited. Excerpts and links may be used, provided that full and clear credit is given to Kevin Closson and Kevin Closson's Blog: Platforms, Databases, and Storage with appropriate and specific direction to the original content.

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