glibc 2.26 memory leak with MySQL?

[Michael Brunnbauer]

hi all,

since upgrading from glibc-2.23 to 2.26, I have observed out of memory errors
in 2 different mysql deployments after 2-3 days of runtime:

170812 15:51:42 [ERROR] /usr/bin/mysqld: Out of memory (Needed 1675264 bytes)
170812 15:52:01 [ERROR] /usr/bin/mysqld: Out of memory (Needed 1677712 bytes)

I've never had such Problems with those mysql deployments before and one
of them is configured for very modest memory usage.

I use mysql 5.5.57 and Kernel 3.16.46. glibc has been compiled with gcc-4.9.4 
like this:

 echo "CFLAGS += -march=i686" > configparms
 ../configure --enable-add-ons --prefix=/usr --enable-kernel=2.6.25 --host=i686-pc-linux-gnu

MySQL has not been recompiled since upgrading glibc and gcc (previous version
4.8.5).

Have there been any changes that can explain this, e.g. the per-thread cache
for malloc?

Regards,

Michael Brunnbauer

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