| Posted by jarimh1984, 08-23-2008, 08:46 AM | | I have Xeon Quadcore 2,13ghz dedicated server, 4GB ram with 150GB raptor disk. Server is running about 35 different PHP XML parsing scripts every 1-4 minutes which saves data to MySql. Currently there are about 1000 queries per / second. After mysql optimization CPU load average maximum has been between 4-5. How much performance gain would I get from upgrading the CentOs 32-bit to 64-bit version. How is the upgrade, can it be done without full OS reinstallation?
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| Posted by whmcsguru, 08-23-2008, 09:17 AM | | You will need to do a complete reload. If it's worth it to you, then go for it, but, there won't be THAT much of an improvement.
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| Posted by RBBOT, 08-24-2008, 05:10 PM | | On 4Gb ram, it depends a lot of what sort of data your primarily working with. If its something like a forum where all the database fields are 32-bit integers and strings, you won't get a massive gain. If it's a financial application or something else with lots of crunching of 64-bit floating point numbers, you will.
Load average of 4-5 on a quad core server is nothing to worry about - remember you have to interpret the load figure in terms of the number of cores.
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| Posted by ragubhat, 08-28-2008, 02:53 AM | | have Xeon Quadcore 2,13ghz dedicated server, 4GB ram
Presume that this is a recent Xeon proc. Do a
'cat /proc/cpuinfo' and if it shows 'lm' and/or 'lahf_lm'
you should install the x64_64 port of CentOS. Performance
increase has been observerd on busy mysql/apache servers.
On a Ubuntu Xeon server, performance of Apache increased
3 times, after the amd64 port was put instead of the x86
port. Load never exceeded 2 and the 4GB RAM was 70%
utilized, no swap usage at all when mysql was addressing
an 8 GB data chunk!
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| Posted by jarimh1984, 08-28-2008, 06:34 AM | | Thanks for the help. Processor is X3210. Since the amount of XML files to be parsed will be increasing in the future, I decided to order second Quadcore server. And this time it will be 64-bit so I can test how much performance gain I really get from changing 32-bit to 64-bit.
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