I have two pretty fresh builds of Lenny running on amd64 arch (a single
cpu/dual core (2 cores) and a dual cpu/dual core (4 cores)), and have been
getting these segfault issues. The machines were set up in late May and thus
have all the latest from the repos.
I confirmed using the shell script that mysql extensions are the problem (both
php5-mysql and php5-mysqli). What I'd like to point out and ask others to
confirm is that the PDO mysql extension seems to work fine. I'm running the
script now with mysql.so and mysqli.so disabled but PDO mysql enabled and I'm
22,000th iteration. This is a lot better than dying after 700 runs!
I also confirm that running on one cpu with taskset seems to avoid the
segfaults. Is the PDO mysql extension making use of a different libmysqlclient?
I'd also like to point out that while my system arch is amd64, debinstaller put
the i686 optimized versions of libc6 on my system. My first segfaults were
always happening referencing librt-2.7.so (100%). I uninstalled the i686 libs
and installed the amd64 libs. After this, the segfaults usually reference
libgcc_s.so.1 but still sometimes reference librt-2.7.so (5%).
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