Re: Too-many-files errors on OS X
От | Kevin Brown |
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Тема | Re: Too-many-files errors on OS X |
Дата | |
Msg-id | 20040223005933.GK2608@filer обсуждение исходный текст |
Ответ на | Re: Too-many-files errors on OS X (Tom Lane <tgl@sss.pgh.pa.us>) |
Ответы |
Re: Too-many-files errors on OS X
Re: Too-many-files errors on OS X |
Список | pgsql-hackers |
Tom Lane wrote: > Kevin Brown <kevin@sysexperts.com> writes: > > I originally thought that each shared library that was loaded would eat > > a file descriptor (since I thought it would be implemented via mmap()) > > but that doesn't seem to be the case, at least under Linux > > Hmm. This may be OS-specific. The shlibs certainly show up in the > output of lsof in every variant I've checked, but do they count against > your open-file limit? It seems not, for both shared libraries that are linked in at startup time by the dynamic linker and shared libraries that are explicitly opened via dlopen(). This seems to be true for Linux and Solaris (I wasn't able to test on HP-UX, and AIX yields a strange "bad file number" error that I've yet to track down). Attached is the test program I used. It takes as its arguments a list of files to hand to dlopen(), and will show how many files it was able to open before and after running a batch of dlopen() commands. -- Kevin Brown kevin@sysexperts.com
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