Major Description
We should backport the fix for MB-38296 to 6.6 as this information is potentially very useful in answering questions related to ns_server pauses or issues with ns_server scheduling.
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While triaging MB-37795 one useful datapoint was /proc/vmstat. It would be useful to gather and report this stat.
Here's what Aliaksey says...
The file is /proc/vmstat. The particular stat is "allocstall", though on recent kernels it seems to be broken up into multiple sub-stats:
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$ grep allocstall /proc/vmstat
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allocstall_dma 0
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allocstall_dma32 0
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allocstall_normal 14
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allocstall_movable 12
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There might be more interesting stats there that I'm not aware of. So we could potentially just get all of them. The only thing is that I'd be cautious to do this every second (though this might be justified).
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Attachments
Issue Links
| For Gerrit Dashboard: MB-38715 | ||||||
|---|---|---|---|---|---|---|
| # | Subject | Branch | Project | Status | CR | V |
| 125748,5 | MB-38715 Use mad-hatter revision of sigar in MH manifest | master | manifest | Status: MERGED | +2 | +1 |
| 125749,5 | [bp] MB-38715 Report /proc/vmstat's allocstall | mad-hatter | ns_server | Status: MERGED | +2 | +1 |
| 126047,2 | Merge remote-tracking branch 'couchbase/mad-hatter' | master | ns_server | Status: MERGED | +2 | +1 |