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Re: [ic] memory usage
on 12/21/01 4:48 AM, Kevin Walsh at kevin@cursor.uk.com wrote:
>>>> 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
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