Is there a way to get server side latency stats for Memcached operations,
like GET, SET, INCREMENT etc?
memcached stats tells you total number of gets and sets, but doesn't
indicate anything about the latency of those operations.
Cheers,
Manish
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Those don't really lag... just "stats sizes", so don't call that one. Also
"stats cachedump" isn't very fast.
If there's any latency at all on a standard operation it's almost always
an outside issue (swap, network, etc), or a massive fault of the software.
Just adding timing measurements interna
Then, what would be a reasonable estimate of latency of GET and SET
operations on memcached server? A milli second?
-mrjn
On Fri, Jul 12, 2013 at 3:32 PM, dormando wrote:
> Those don't really lag... just "stats sizes", so don't call that one. Also
> "stats cachedump" isn't very fast.
>
> If t
On a healthy machine, over the network, and memcached isn't overloaded,
0.1ms response times are what you should expect.
On Fri, 12 Jul 2013, Manish Jain wrote:
> Then, what would be a reasonable estimate of latency of GET and SET
> operations on memcached server? A milli second?
> -mrjn
>
>
>
>
Nice. Is there any methodology I could apply to actually gather server side
response times, say even at the cost of slightly performance degradation?
On Fri, Jul 12, 2013 at 3:47 PM, dormando wrote:
> On a healthy machine, over the network, and memcached isn't overloaded,
> 0.1ms response times
I really hate to say it, but if you're going down this route, something
else is wrong. Memcached's internal response times are never the problem.
Are you still working on that issue we discussed a while back? I got
overbusy due to a conference but we should bring it up again.
On Fri, 12 Jul 2013,
i know here is not mysql, but just a number to compare...
in mysql query cache, time expend from last package received to query cache
hit, is about 7us (no network time here, just find query in query cache)
with 1018 queries in cache (small)
the 'key' is about 200bytes of query + (+- 20bytes of fla
