Is this approach, valid when you use coss as storage ? What would be the recomendation if it's not ? Regards, Pablo On 6/12/07, Michael Puckett <Michael.Puckett@xxxxxxx> wrote:
Dave, Yes, absolutely setting a small max_size in memory is the right approach. This then lets the kernel consume the available main memory for i/o buffers which then suffices quite well for the in-memory cache which gets managed by the OS. We have used this technique for years and get great performance from it. We would like to now experiment with tuning the i/o buffer sizes to minimize the read/write system calls. As a point of clarification we are running a Sun X64 Solaris 10 box, not Linux. We are running 3 Gbit NICs right now at about 80% of peak when the object is in memory from a single squid. -mikep Dave Dykstra wrote: > In my performance optimizations of squid I didn't see any benefit to > increasing Linux kernel network buffers. Those are mostly useful for > high-latency (long distance) connections, and I was concentrating on > high speed LAN accesses. I did see a huge increase in performance by > making sure that squid's maximum_object_size_in_memory was small; I set > it at 128KB. The Linux filesystem cache, which as far as I know can > take advantage of all available memory automatically, is much faster > than squid's memory cache for large and even moderately sized objects. > How much throughput are you able to get through the 4 Gbits of network > connections with a single squid? > > - Dave Dykstra > > On Mon, Jun 11, 2007 at 06:13:32PM -0700, Michael Puckett wrote: > >> My squid application is doing large file transfers only. We have >> (relatively)few clients doing (relatively)few transfers of very large >> files. The server is configured to have 16 or 32GB of memory and is >> serving 3 Gbit NICs to the clients downstream and 1 Gbit NIC upstream. >> We wish to optimize the performance around these large file transfers >> and desire to run large I/O buffers to the networks and the disk. Is >> there a tunable buffer size parameter that I can set to increase the >> network and disk buffer sizes? >> >> Regards >> >> -mikep >>
