Re: memory usage squid 1.1.3

Hello,

Duane Wessels writes:
> Benoit.Rossier@mcnet.ch writes:
>
> >Hi,
> >
> >We have squid 1.1.3 on a FreeBSD 2.1.5 box.
> >What is the difference between Process Size and total memory
> >accounted in cache information (see below)?
>
> The reported "Process Size" is determined from the getrusage(2)
> system call. Some systems may report it as kbytes, some as pages.
> We're probably multiplying the ru_maxrss value by getpagesize()
> when we should not be. Check your man page for getrusage(2)
> and let me know if it reports kbytes or pages.
>
> Duane W.
>

Is this problem resolved? It appears to be the same under
Linux. Process Size is used up way more than specified:

From squid.conf:

cache_mem 4

Squid Object Cache: Version 1.1.1
Start Time: Thu, 16 Jan 1997 15:19:18 GMT
Current Time: Mon, 20 Jan 1997 13:05:30 GMT
Connection information for squid:
        Number of TCP connections: 2783
        Number of UDP connections: 359
        Connections per hour: 33.5
Cache information for squid:
        Storage Swap size: 37 MB
        Storage Mem size: 2608 KB
Resource usage for squid:
        CPU Time: 58 seconds (34 user 24 sys)
        CPU Usage: 0%
        Process Size: rss 0 KB
        Page faults with physical i/o: 7745
Memory usage for squid via mallinfo():
        Total space in arena: 5477 KB
        Ordinary blocks: 4135 KB 1122 blks
        Small blocks: 0 KB 0 blks
        Holding blocks: 716 KB 3 blks
        Free Small blocks: 0 KB
        Free Ordinary blocks: 1342 KB
        Total in use: 4851 KB 89%
        Total free: 1342 KB 25%
File descriptor usage for squid:
        Max number of file desc available: 1024
        Largest file desc currently in use: 14
        Available number of file descriptors: 1009
        Reserved number of file descriptors: 100
Internal Data Structures:
          3566 StoreEntries
           224 StoreEntries with MemObjects
           224 StoreEntries with MemObject Data
           223 Hot Object Cache Items
Accounted Memory Usage:
        StoreEntry 3566 x 52 bytes = 181 KB
        URL strings = 176 KB
        IPCacheEntry 1 x 36 bytes = 0 KB
        FQDNCacheEntry 0 x 56 bytes = 0 KB
        Hash link 223 x 12 bytes = 2 KB
        Pool MemObject structures 224 x 92 bytes = 20 KB ( 0 free)
        Pool for Request structur 7 x 4400 bytes = 30 KB ( 0 free)
        Pool for in-memory object 769 x 4096 bytes = 3076 KB ( 0 free)
        Pool for disk I/O 0 x 8192 bytes = 0 KB ( 0 free)
        NetDB Address Entries 0 x 72 bytes = 0 KB
        NetDB Host Entries 0 x 8 bytes = 0 KB
        ClientDB Entries 8 x 160 bytes = 1 KB
        Miscellaneous = 908 KB
        Total Accounted = 4396 KB

But when you look at the process size squid eats up 7.7 MB (which is
ever increasing in the long run). It never should be more than
cache_mem if I understand it correctly:

# ps -auxw | grep squid
root 419 0.0 9.3 7748 3344 ? S Jan 16 1:00 /usr/local/squid/bin/squid

This is what the Linux getrusage(2) man page says:

       getrusage returns the current resource usages, for a who
       of either RUSAGE_SELF or RUSAGE_CHILDREN.

            struct rusage
            {
                 struct timeval ru_utime; /* user time used */
                 struct timeval ru_stime; /* system time used */
                 long ru_maxrss; /* maximum resident set size */
                 long ru_ixrss; /* integral shared memory size */
                 long ru_idrss; /* integral unshared data size */
                 long ru_isrss; /* integral unshared stack size */
                 long ru_minflt; /* page reclaims */
                 long ru_majflt; /* page faults */
                 long ru_nswap; /* swaps */
                 long ru_inblock; /* block input operations */
                 long ru_oublock; /* block output operations */
                 long ru_msgsnd; /* messages sent */
                 long ru_msgrcv; /* messages received */
                 long ru_nsignals; /* signals received */
                 long ru_nvcsw; /* voluntary context switches */
                 long ru_nivcsw; /* involuntary context switches */
            };

Regards,

Dirk

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