Also, just for completeness: Does:
`-C -m 10240 -I 20m -c 4096 -o modern` also fail under .30? (without the slab_chunk_max change) On Fri, 12 Aug 2016, dormando wrote: > FML. > > Please let me know how it goes. I'm going to take a hard look at this and > see about another bugfix release... there're a couple things I forgot from > .30 anyway. > > Your information will be very helpful though. Thanks again for testing it. > All of my testing recently was with explicit configuration options, so I > didn't notice the glitch with -o modern :( > > On Fri, 12 Aug 2016, andr...@vimeo.com wrote: > > > It will take a while to fill up entirely, but I passed 2GB with 0 > > evictions, so it looks like that probably does the job. > > > > On Friday, August 12, 2016 at 3:02:47 PM UTC-4, Dormando wrote: > > Ahhhh crap, I think I see it. > > > > Can you add: `-f 1.25` *after* the -o stuff? > > > > like this: > > > > `-C -m 10240 -I 20m -c 4096 -o modern,slab_chunk_max=1048576 -f 1.25` > > > > And test that out, please? I might have to back out some > > over-aggressive > > switches... and I keep thinking of making this particular problem > > (which > > I'll talk about if confirmed) a startup error :( > > > > On Fri, 12 Aug 2016, and...@vimeo.com wrote: > > > > > Here you go. > > > Yes, 1.4.25 is running with `-C -m 10240 -I 20m -c 4096 -o > > maxconns_fast,hash_algorithm=murmur3,lru_maintainer,lru_crawler,slab_reassign,slab_automove`. > > > 1.4.30 is running with `-C -m 10240 -I 20m -c 4096 -o > > modern,slab_chunk_max=1048576`. > > > > > > > > > On Friday, August 12, 2016 at 2:32:59 PM UTC-4, Dormando wrote: > > > Hey, > > > > > > any chance I could see `stats slabs` output as well? a lot of > > the data's > > > in there. Need all three: stats, stats items, stats slabs > > > > > > Also, did you try 1.4.30 with `-o slab_chunk_max=1048576` as > > well? > > > > > > thanks > > > > > > On Fri, 12 Aug 2016, and...@vimeo.com wrote: > > > > > > > Thanks! That's an improvement. It's still worse than older > > versions, but it's better than 1.4.29. This time it made it up to about > > 1.75GB/10GB used > > before it > > > started evicting; > > > > I left it running for another 8 hours and it got up to 2GB, > > but no higher. > > > > Here's some stats output from the old and new versions, in > > case you can puzzle anything out of it. > > > > > > > > Thanks, > > > > > > > > Andrew > > > > > > > > > > > > On Thursday, August 11, 2016 at 6:14:26 PM UTC-4, Dormando > > wrote: > > > > Hi, > > > > > > > > > > https://github.com/memcached/memcached/wiki/ReleaseNotes1430 > > > > > > > > Can you please try this? And let me know how it goes > > either way :) > > > > > > > > On Wed, 10 Aug 2016, dormando wrote: > > > > > > > > > Hey, > > > > > > > > > > Thanks and sorry about that. I just found a bug > > this week where the new > > > > > code is over-allocating (though 30MB out of 10G > > limit seems odd?) > > > > > > > > > > ie: with -I 2m, it would allocate 2 megabytes of > > memory and then only use > > > > > up to 1mb of it. A one-line fix for a missed > > variable conversion. > > > > > > > > > > Will likely do a bugfix release later tonight with > > that and a few other > > > > > things. > > > > > > > > > > Will take a look at your data in hopes it's the > > same issue at least, > > > > > thanks! > > > > > > > > > > On Wed, 10 Aug 2016, and...@vimeo.com wrote: > > > > > > > > > > > I decided to give this a try on a production > > setup that has a very bimodal size distribution (about a 50/50 split of > > 10k-100k values and 1M-10M > > values) > > > and > > > > lots of writes, > > > > > > where we've been running with "-I 10m -m 10240" > > for a while. It didn't go so great. Almost immediately there were lots and > > lots of evictions, > > even > > > though the > > > > used memory was > > > > > > only about 30MB of the 10GB limit, and the number > > of active keys grew very slowly. "-o slab_chunk_max=1048576" may have had > > some effect, but it > > didn't > > > really > > > > seem like it. > > > > > > Setting "slabs automove 2" (usually 1) reduced > > evictions about 50% but it still wasn't enough to get acceptable > > performance. > > > > > > I've rolled back to 1.4.25 for the moment, but > > I'm attaching a log with "stats" and "stats items" from yesterday. "stats > > sizes" wasn't > > available due to > > > -C, and > > > > the log isn't > > > > > > from as long after startup as I would like, but > > it's what I got, sorry. > > > > > > > > > > > > Let me know if there's anything else I can do to > > help. > > > > > > > > > > > > Thanks, > > > > > > > > > > > > Andrew > > > > > > > > > > > > On Wednesday, July 13, 2016 at 8:08:49 PM UTC-4, > > Dormando wrote: > > > > > > > > https://github.com/memcached/memcached/wiki/ReleaseNotes1429 > > > > > > > > > > > > enjoy. > > > > > > > > > > > > -- > > > > > > > > > > > > --- > > > > > > You received this message because you are > > subscribed to the Google Groups "memcached" group. > > > > > > To unsubscribe from this group and stop receiving > > emails from it, send an email to memcached+...@googlegroups.com. > > > > > > For more options, visit > > https://groups.google.com/d/optout. > > > > > > > > > > > > > > > > > > > > > > -- > > > > > > > > > > --- > > > > > You received this message because you are > > subscribed to the Google Groups "memcached" group. > > > > > To unsubscribe from this group and stop receiving > > emails from it, send an email to memcached+...@googlegroups.com. > > > > > For more options, visit > > https://groups.google.com/d/optout. > > > > > > > > > > > > > -- > > > > > > > > --- > > > > You received this message because you are subscribed to the > > Google Groups "memcached" group. > > > > To unsubscribe from this group and stop receiving emails > > from it, send an email to memcached+...@googlegroups.com. > > > > For more options, visit https://groups.google.com/d/optout. > > > > > > > > > > > > > > -- > > > > > > --- > > > You received this message because you are subscribed to the Google > > Groups "memcached" group. > > > To unsubscribe from this group and stop receiving emails from it, > > send an email to memcached+...@googlegroups.com. > > > For more options, visit https://groups.google.com/d/optout. > > > > > > > > > > -- > > > > --- > > You received this message because you are subscribed to the Google Groups > > "memcached" group. > > To unsubscribe from this group and stop receiving emails from it, send an > > email to memcached+unsubscr...@googlegroups.com. > > For more options, visit https://groups.google.com/d/optout. > > > > > > -- > > --- > You received this message because you are subscribed to the Google Groups > "memcached" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to memcached+unsubscr...@googlegroups.com. > For more options, visit https://groups.google.com/d/optout. > -- --- You received this message because you are subscribed to the Google Groups "memcached" group. 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