[Orca-dev] Re: too many open files issue

Blair Zajac blair at gps.caltech.edu
Thu Apr 26 09:40:45 PDT 2001


The way to limit the number of open files that Orca uses is to edit
lib/Orca/OpenFileHash.pm and find the 100 and lower this.  Try this
and see what happens.  Which version of Orca are you using?

If this doesn't work, then can you try running Orca with just one
host instead of 6 and put the HTML pages up for viewing so I can
take a look at them.

At this point, put the scripts up on your site with some example
plots, that's the best way.


Adrian Bhatt wrote:
> I searched the archives and some some discussion to
> having issues of too many open files. Most of those
> issues were solved by increase the file descripter
> limit from something like 64 to 128 or 256. We started
> our file descripter limit at 512. All was working
> really well. Last night at the request of certain data
> from the business we added some plots detailing some
> more information about different file system usage. So
> I set up the plots at let orca munge through all the
> data, to my dismay I came back an hour later to find
> error messages like the ones below. So I did some math
> and figured that at 6 servers, the normal plots, as
> well as a plot for each file system (40 per box) that
> the number of files (html/png/meta) that orca would be
> creating was reaching into the thousands. So I
> increased the file descripter limit to 1024. Still no
> good. Then to 2048. Still no good. Then to 4096. When
> it failed at this point I began thinking something is
> wrong. I started looking through the code mostly at
> HTMLFile.pm then how it was called. I am a little
> confused about how you open files then how they get
> closed, but that is probally because I only spent
> about 20 minutes looking through it. Is it possible
> there is some sort of leak that under X condition it
> doesn't close some file handle right away? If so were
> should I start looking for such a leak?
> We have also created some scripts which create data
> files for various peices of equipment to feed into
> orca. Is there a place to publish such scripts or
> should I publish them on my site and send a link to
> the user list? Just wondering how to give back to the
> community.
> Thanks again for any help. It would be greatly
> appreciated.
> Bob
> /opt/orca/bin/orca: warning: cannot create
> Orca::HTMLFile object: cannot open
> `/opt/orca/data/e10k/html/o_mntC_per_mkt_per_app_per_dqmgr_p,o_mntU_per_mkt_per_app_per_dqmgr_p,o_mntA_per_mkt_per_app_per_dqmgr_p-monthly.html.htm'
> for writing: Too many open files.
> /opt/orca/bin/orca: warning: cannot create
> Orca::HTMLFile object: cannot open
> `/opt/orca/data/e10k/html/o_mntC_per_mkt_per_app_per_dqmgr_p,o_mntU_per_mkt_per_app_per_dqmgr_p,o_mntA_per_mkt_per_app_per_dqmgr_p-quarterly.html.htm'
> for writing: Too many open files.
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