On Wed, 2005-11-16 at 12:41 +0000, James Vanns wrote: > <snip> > > > With approximately 3000 open file descriptors (configured at compile > > > time and set at runtime with ulimit -HSn 16384) and an equivalent no. of > > > client/server TCP connections we see a constant CPU usage of ~95-100%. > > > Is this normal!? The hardware is as follows: > > > > I don't think so. Try strace and ltrace on running squid. > > Yeah I have actually run squid through strace and the only alarming > thing is the huge amount of bind() calls on 0.0.0.0 and port htons (0). > And by huge amount I mean practically every lookup (I guess somehow this > is related to the internal DNS lookups).
Sorry I should have said 'squid's internal resolver' to avoid confusion ;) > Surely you don't need to call > bind() for every query!? Or am I missing something here? Admittedly I > didn't spend much time analysing the strace output. > > > > Dual Intel(R) Xeon(TM) CPU 3.20GHz (Linux of course manages the CPU > > > affinity as we know squid isn't multi-threaded) > > > 6G of memory > > > > IIUC one squid will load only one CPU, how do you get "95-100%" load > > on both? > > You misunderstand (I think). That percentage I gave was per CPU e.g. > 95-100% usage on CPU0 not across all (0-3) processors. > > Jim > > > -- > > vda > -- > James Vanns BSc (Hons) MCP > Canterbury Christ Church University > Senior Systems Programmer (Linux / C & C++) > Encryption Key: > http://keys.se.linux.org/pks/lookup?op=get&search=0x3B09EE224A653EA9 > Signature Verification Key: > http://keys.se.linux.org/pks/lookup?op=get&search=0x47FF170724959054 > -- James Vanns BSc (Hons) MCP Canterbury Christ Church University Senior Systems Programmer (Linux / C & C++) Encryption Key: http://keys.se.linux.org/pks/lookup?op=get&search=0x3B09EE224A653EA9 Signature Verification Key: http://keys.se.linux.org/pks/lookup?op=get&search=0x47FF170724959054
