Recently I've noticed many of core.some_number files in my root cgi-bin GLinks folder. Every file is about 18MB large or larger. Sys admin told me that it's because php script got run of memory but GLinks isn't php script so don't know why it's there.

Any idea?

UnReal Network

Hi,

Please take a look at the file, what does it say? (send over FTP access, and I'll take a look for you otherwise - not sure how powerful your PC is to read a large file like that :))

Normally - that is caused by mySQL dying - so it gives debug info. Coudl you an excessive script being run, and dying.

Cheers

Andy (mod)
andy@ultranerds.co.uk

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Ok. I've just deleted them because they took too much of my disk space but as soon one is generated, I'll PM you ftp access.

Regards.

UnReal Network

Ok

Cheers

Andy (mod)
andy@ultranerds.co.uk

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Are you expecting to open an 18MB core dump file and see something like "Error: System low on memory" ?

You are going to have no idea what the content of the core dump means. It contains an image of the terminated processes memory. Can you read binary?


Core dump files can be generated by many many things. They aren't "normally" MySQL at all. MySQL has it's own error file.

Well, I wasn't aware of that - I'm just remembering back to something someone else told me, when I had those core.xx files on one of my sites, a good 4 or 5 years ago

In that case - guess there are 2 options:

1) (the easiest :P) - run a cronjob that will remove the core.* files
2) Try a fugure out why these dump files are being made =) (not so easy, as Wychwood said - it can be quite a few things that make these dump files)

Cheers

Andy (mod)
andy@ultranerds.co.uk

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Damn. I've just have few of them with 15MB each. Well, will try to setup cron job then. Thanks, anyway.

UnReal Network

Not sure off hand if this can be done with a simple one-liner - but you could do with a cronjob, on a .sh file:

delete_core.sh


..then upload that file into your admin folder.

Then, setup a cronjob with:


You *MAY* be able to do it just via a one-liner cronjob too (not tested this, but I seem to recall you can do more than one command per cronjob)


As always though - MAKE SURE YOU BACKUP - you can never be too careful when using the delete commands =)

Cheers

Andy (mod)
andy@ultranerds.co.uk

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Try checking the running processes from the command line - see if anything looks like it's using up resources.