Hi Ceriel, > As soon as the virtuoso.log mentions "Exceeded maximum number of file > descriptors in FD_SET." > in a testing environment (=few users), > how should the OS or virtuoso or the OS be reconfigured?
There are three posibilities: 1. Your ulimit / kernel settings are too small for your usage. 2. Your C library can only handle so many concurrent open file descriptors on a default compile. This is indicated by the FD_SETSIZE define in select.h. On Mac OS X this is a default of 1024, so if you have over 1024 concurrent files opened this can be an issue. Remember that all open connections count e.g. HTTP/ODBC/JDBC sessions as well as database files and temp streams. If this is the case, some header files allow you to set FD_SETSIZE to a larger value, but i would need to check if Apple can handle this. 3. You are experiencing a fd leak. I will send you a patch that could resolve this problem. > /usr/local/virtuoso-opensource/var/lib/virtuoso/db/virtuoso.log > --- > 23:42:14 Checkpoint made, log reused > > Mon Jan 18 2010 > 00:30:06 Exceeded maximum number of file descriptors in FD_SET. > 00:42:16 Exceeded maximum number of file descriptors in FD_SET. > 00:42:16 Checkpoint made, log reused > 00:42:16 Exceeded maximum number of file descriptors in FD_SET. > 00:42:17 Server received signal 11. Continuing with the default action for > that signal. > > Mon Jan 18 2010 > 16:30:17 OpenLink Virtuoso Universal Server > 16:30:17 Version 06.00.3123-pthreads for Darwin as of Jan 12 2010 > 16:30:17 uses parts of OpenSSL, PCRE, Html Tidy > 16:30:29 Database version 3100 > 16:30:30 SQL Optimizer enabled (max 1000 layouts) > 16:30:34 Compiler unit is timed at 0.002779 msec > 16:30:37 Roll forward started > 16:30:37 2 transactions, 87 bytes replayed (100 %) > 16:30:37 Roll forward complete > 16:30:39 Checkpoint made, log reused > 16:30:42 HTTP/WebDAV server online at 8890 > 16:30:42 Server online at 1111 (pid 7403) > 17:30:42 Checkpoint made, log reused Patrick
