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RE: [ic] memory usage
> >>>> In analyzing some speed problems, redhat linux indicates that the
> >>>> interchange process itself is using 204mb of memory. We have a
> catalog
> >>>> of over 100,000 items. Is this typical? Could some of the speed
> issues
> >>>> we have be attributed to having a system with 512mb of total
memory
> and
> >>>> each interchange instance requiring 204mb (granted that a good
chunk
> >>>> appears to be shared)?
> >>>>
> >>> Are you sure that's 204MB and not 20.4MB? The memory usage you
are
> >>> seeing would not be typical. How are you measuring that amount?
> >>>
> >> I run the "top" utility in redhat and the memory clearly indicates
204M
> >> where the next largest process has a value such as 12500 for
something
> like
> >> mysqld. I'm assuming values are in units of 'K' so mysqld is using
> 12.5mb
> >> with interchange at 204mb. I'd like to see what other people have
as a
> >> value. I do have 150,000 items in the products table. Is
interchange
> caching
> >> data?
> >>
> > Interchange doesn't cache resultsets or any other dynamic data
between
> > page requests, other than small things such as database connection
> > handles, so that shouldn't be an issue.
> >
> > As a comparison, here are my largest interchange, httpd and mysql
> > processes, as reported by top and then pasted here:
> >
> > PID USER PRI SIZE TRS RSS SHARE STAT %CPU %MEM TIME COMMAND
> > 19634 centrewo 0 25252 636 24M 15032 S 0.0 1.6 0:08
> interchange
> > 20712 nobody 0 5788 808 5396 4884 S 0.0 1.3 0:00 httpd
> > 671 mysql 0 4380 1168 4076 1112 S 0.0 0.2 0:00 mysqld
> >
> > It looks like both your interchange and mysql processes are using
> > around 10x the memory that mine do, which is why I asked whether
> > you meant 20.4MB rather than 204MB.
> >
> > I'm at a loss to explain how your interchange process could sustain
> > a size of 204MB, unless you are keeping your products table as an
> > 'in-memory' table, or are running thousands of shops. Even then,
> > your mysqld seems to be using more memory than it is entitled to.
> >
> > Can anyone else shed some light on this?
>
> mine is similar to above also...
>
> PID USER PRI NI SIZE RSS SHARE STAT %CPU %MEM TIME COMMAND
> 13877 interch 9 0 24916 24M 14260 S 0.0 3.2 0:15
interchange
> 13017 apache 9 0 3520 3520 3104 S 0.0 0.4 0:00 httpd
> 610 mysql 5 0 3368 3368 1496 S 0.0 0.4 0:01 mysqld
>
I created the original post on this. Just to be clear, here's my pasted
output from "top":
PID USER PRI NI SIZE RSS SHARE STAT LIB %CPU %MEM TIME
COMMAND
4601 interch 9 0 205M 194M 1572 S 0 0.0 38.7 0:28
interchange
517 mysql 9 0 10740 10M 1544 S 0 0.0 2.0 0:00
mysqld
520 mysql 8 0 10740 10M 1544 S 0 0.0 2.0 0:01
mysqld
521 mysql 9 0 10740 10M 1544 S 0 0.0 2.0 4:31
mysqld
Peter
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