> On 04/03/2016 15:26, Li, Liang Z wrote: > >> > > >> > The memory usage will keep increasing due to ever growing caches, > >> > etc, so you'll be left with very little free memory fairly soon. > >> > > > I don't think so. > > > > Roman is right. For example, here I am looking at a 64 GB (physical) machine > which was booted about 30 minutes ago, and which is running disk-heavy > workloads (installing VMs). > > Since I have started writing this email (2 minutes?), the amount of free > memory has already gone down from 37 GB to 33 GB. I expect that by the > time I have finished running the workload, in two hours, it will not have any > free memory. > > Paolo I have a VM which has 2GB of RAM, when the guest booted, there were about 1.4GB of free pages. Then I tried to download a large file from the internet with the browser, after the downloading finished, there were only 72MB of free pages left, as Roman pointed out, there were quite a lot of Cached memory. Then I tried to compile the QEMU, after the compiling finished, there were about 1.3G free pages. So even the cache will increase to a large amount, it will be freed if there are some other specific workloads. The cache memory is a big issue that should be taken into consideration. How about reclaim some cache before getting the free pages information? Liang -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
