On 08/10/2011 04:51 PM, Mauras Olivier wrote: > Hello, > > I have several containers running on a host - ~10 > One of them is running a MySQL database. Several of the others are running > php code under apache that fetch datas from the database. > > Host is using eth0, while my containers are on a bridge using eth1, and > configured in macvlan bridge mode. Host runs SL6 with 2.6.32 RH kernel - > Host is a VMWare ESX virtual machine for that matter. > Ping latency between containers is at an average of 0.050 ms > > What i noted, is that one webapp were getting very slow... After > investigating, the only thing that i could find, is that requests from > containers are _slower_ than from any other hosts. > > See below: > > container1 ~ # time (echo "select * from testsuites;" | mysql -h > container_mysql -u nmp -pxxx testlink) > id details > 42 > (... cut only 25 entries anyway) > > real *0m0.875s* > > Time varies between 0.8 and 1.2s > >>From the host or another VM on the same network with the exact same request: > > real *0m0.022s* > > > So that particular app that can loop over 19 requests takes sometimes up to > 20s to display a page instead of ~0.5s from another host... > > Is there some sysctl/settings to tweak or it's just not relevant to make > requests between containers on the same host??
Hmm, thanks for the detailed explanation. Can you check with tcpdump if there are problems with the patch checksums ? And try to disable the TSO and SGO of eth1 if there are available ? ------------------------------------------------------------------------------ uberSVN's rich system and user administration capabilities and model configuration take the hassle out of deploying and managing Subversion and the tools developers use with it. Learn more about uberSVN and get a free download at: http://p.sf.net/sfu/wandisco-dev2dev _______________________________________________ Lxc-users mailing list Lxc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/lxc-users
