> Basically the memcache*d* extension for PHP was buggy yeah, and that's the reason I wrote our own memcached client for PHP5 & 7. We believe it's very stable as we do not experience even a single failure in our cloud service for years.
Please try out! https://github.com/cybozu/php-yrmcds/ 2016年11月17日木曜日 8時58分48秒 UTC+9 Slawomir Pryczek: > > > Here is nice page describing the issue: > http://developers.nk.pl/tag/gc/ > > >The reality in nk.pl was that evictions of valid items happened hundreds > >of times per second even though there were 50% of expired items, > >because there is no inherent correlation between TTL and the pattern of > usage. > > So basically if you have a plenty of items with short TTL, like 10-30 > seconds, and then some items that need to live long, eg. 10 minutes, then > the short living items will pile up at the beginning of the list, and > memory will never be reclaimed, because GC will not pass the "barrier" > created by long living items at the end (it starts from the end), because > it'll clean only first expired item(s) found. In recent memcached release > there is some mechanism to traverse all items from time to time... not sure > how good it works, > > https://github.com/memcached/memcached/wiki/ReleaseNotes1431 > > Basically the memcache*d* extension for PHP was buggy and that's one of > the reason for writing my project ... > > > W dniu środa, 16 listopada 2016 22:52:55 UTC+1 użytkownik Jesper Louis > Andersen napisał: >> >> >> >> On Wed, Nov 16, 2016 at 3:10 PM Slawomir Pryczek <slawe...@gmail.com> >> wrote: >> >>> >>> - Much better Garbage Collection mechanism, that isn't skipping items >>> with short TTLs like LRU, so memory is not occupied with garbage data even >>> if item TTLs differ a lot. >>> >>> >> Could you expand on what this problem is? It sounds like a subtlety many >> people implementing LRU will hit and overlook. Perhaps give an example of >> what happens. >> >> > -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
