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<p>Library Version 18.1.40</p>
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<strong>I can't compile and run
multithreaded applications.</strong>
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<p>
Special compile-time flags are required when
compiling threaded applications on Linux. If you are
compiling a threaded application, you must compile
with the _REENTRANT flag:
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<pre class="programlisting">cc -D_REENTRANT ...</pre>
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The Berkeley DB library will automatically build
with the correct options.
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<strong>I see database corruption when
accessing databases.</strong>
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Some Linux filesystems do not support POSIX
filesystem semantics. Specifically, ext2 and early
releases of ReiserFS, and ext3 in some configurations,
do not support "ordered data mode" and may insert
random data into database or log files when systems
crash. Berkeley DB files should not be placed on a
filesystem that does not support, or is not configured
to support, POSIX semantics.
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<strong>What scheduler should I
use?</strong>
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In some Linux kernels you can select schedulers,
and the default is the "anticipatory" scheduler. We
recommend not using the "anticipatory" scheduler for
transaction processing workloads.
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