Am 18.01.2014 20:50, schrieb Jorge Bastos: >>> Does anyone has an environment similar to the one I'm going to >> describe? >>> Linux VM running MySQL+DBMail (under hyper-v or other type), with an >>> SSD attached on the host machine being used on the Linux guest as >> swap? >> >> i don't get the swap-question >> >> * swap is bad >> * swap is absolutely bad in virtual machines >> * waste a hyperfast and expensive SSD for swap is uhm missing the words > > But have you tested this exact scenario?
no because i refuse to find a valid reason for swap on a server yes, swap is faster on SSD, but that makes the overall situation not better than proper configuration not needing swap if your server not is using swap most of the time it does not matter how fast swap is at all, if it heavily starts using swap it goes down in any case because page-faults, cache-faults and all the overhead of swap out memory pages which are often accessed again causing other pages to be swapped and sort after dead loaded agin in circles if you invest the same money for the SSD disk in RAM and raise the innodb_buffer you gain *a lot* of more performance
signature.asc
Description: OpenPGP digital signature
_______________________________________________ DBmail mailing list [email protected] http://mailman.fastxs.nl/cgi-bin/mailman/listinfo/dbmail
