Re: Ceph counters

[Jakes John <jakesjohn12345@xxxxxxxxx>]

Bump:). It would be helpful, if someone can share info related to debugging using counters/stats

On Sun, Oct 12, 2014 at 7:42 PM, Jakes John <jakesjohn12345@xxxxxxxxx> wrote:

Hi All,

          I would like to know if there are useful performance counters in ceph which can help to debug the cluster. I have seen hundreds of stat counters in various daemon dumps. Some of them are,

1. commit_latency_ms

2. apply_latency_ms

3. snap_trim_queue_len

4. num_snap_trimming

What do these indicate?. . 

I have used iostat, atop for cluster statistics but, none of them indicate the internal ceph status.  Machines might be new but, osds can still be slow.  If some of these counters can help to debug why certain osds are bad( or can get bad later), it would be great. Some counters like total processed requests, pending requests in queue, avg time taken to process a request etc ? 

Are there any docs for all performance counters which I can read?. I couldn't find anything in ceph docs.

Thanks

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