Hi, > Hello Li, > > Thanks for your response. > > On 23 jun 2008, at 04:00, Li Xiaodong wrote: > > According to the information you give, my suggestions are as follows: > > 1. Check if there are daemon processes named pdflush running in your > > system. > > If have 2 pdflush daemons running. Which means it is not because of IO that occupies too many caches. > > 2. If NOT, > > 2.1 turn the value of /proc/sys/vm/dirty_backgound_ratio to 5 or > > less. 2.2 turn the value of /proc/sys/vm/dirty_ratio to 5 or less. > > 2.3 turn the value of /proc/sys/vm/dirty_expire_centisecs to 5 or > > less. > > 2.4 wait > > 3. If it still not works, > > 3.1 turn the value of /proc/sys/vm/vfs_cache_pressure to 1000. > > 3.2 run a much-memory-occupy program. > > 3.3 wait > > Ok, I increased vfs_cache_pressure from 100 to 1000 and created a large > process. > Apparently it freed up some memory by shrinking the cache. So now my > MemFree has increased and Buffers and Cached are much smaller. But it > has not really solved the larger issue. How many MBs does your large process occupy? Make this process take 80%-90% of your memory. > Adding MemFree + Buffers + Cached + AnonPages + Mapped + Slab still > ends up at only about 348464, so I'm still wondering where the other > 60% of my physical memory is hanging out. > > Why did you ask me to increase vfs_cache_pressure. Do you think > something is wrong with the dentry cache? Maybe too many inodes and dentries live in your slab. And without memory pressure, system may just leave them alone. By increasing vfs_cache_pressure and running 'large process', system will reclaim that part of memory back. > I think dcache memory should show up under SReclaimable, is that right? > > Do you agree that MemFree + Buffers + Cached + AnonPages + Mapped + > Slab should add up to total physical memory or am I missing something? > > > 4. If it still not works, reboot your computer... > > Sure, but that would be admitting defeat. > > Thanks, Joris. > -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ
