I think not only the kernel/malloc, also the libs (libmnl and libnetfilter) squid depends on with ubuntu 14.04, we try to rebuild it, keep watching the status.
2015-12-01 9:01 GMT+08:00 风声 <fengsheng...@gmail.com>: > Hi > > Finally, we found the root cause, it is kernel issue with specific version > on ubuntu 14.04. > > We prepared new environment for testing, 3.3.8，3.5.11，2.7 on ubuntu 12.04 > and 14.04. > > 3.3.8，3.5.11 on ubuntu 12.04 is ok > 2.7 on ubuntu 14.04 is ok > > 3.3.8，3.5.11 on ubuntu 14.04 is abnormal. > > > I found this > https://bugs.launchpad.net/ubuntu/+source/linux-meta-lts-trusty/+bug/1516738 > > and I downgrade kernel version to 3.13.0-57 on ubuntu 14.04, memory usage > is normal now. > > I don't know how was it introduced into kernel on ubuntu 14.04, but it is > really works for me. > > Thanks for you help . > > > > > > 2015-11-30 16:55 GMT+08:00 Amos Jeffries <squ...@treenet.co.nz>: > >> On 30/11/2015 9:31 p.m., 风声 wrote: >> > We did not enable squid cache, so I think memory is ok for our case, >> and we >> > run squid servers (without cache, without cache cluster, just as forward >> > proxy) more than 100 servers more than 1 years in AWS serveral regions >> with >> > EC2 c3.xlarge on ubuntu 12.04. It was always running well. >> > >> > Just after upgrade ubuntu 14.04, we found the memory usage increased. >> > >> > Server Spec: AWS EC2 c3.xlarge (4 Cores, 7.5GB Memory, 2 x 40 GB SSD) >> > >> > Before upgrade: >> > >> > 12.04: >> > Memory usage is always less than 50% (3.5GB), will increase or decrease >> > because traffic changes >> > CPU is very low, same as Disk IO, B/W (In or Out) is 500Mb/s at most, is >> > around 200Mb/s most of time. >> > >> > 14:04 >> > Memory usage is about 80-90 % (nearly 7GB), will increase , but it >> decrease >> > very slow, and always keeping more than 50% (3.5GB), >> > CPU is very low, same as Disk IO, B/W (In or Out) is 500Mb/s at most, is >> > around 200Mb/s most of time. >> > >> > I tested with squid-3.3.8 (ubuntu offical packages), and squid-3.5.11 on >> > 12.04 and 14.04, I think it is most likely ubuntu related issue ? >> because >> > same version, same configs, but different OS versions. >> >> Most likely. Though a whole OS of difference has many moving parts. By >> keeping Squid the same you have eliminated it specifically as the cause. >> But all the libraries it uses will be different in each OS. >> >> If there was a 32-bit to 64-bit change in the hardware or memory >> allocation system you could also see this same change. >> >> Amos >> >> >
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