I don't know about 5.1 and 5.5, but I've tested 5.6.21 and the fix is working: $ rpm -qa |grep -i 'percona\|gdb' gdbm-1.8.0-28.el5 Percona-Server-shared-56-5.6.21-rel70.1.el5 Percona-Server-server-56-5.6.21-rel70.1.el5 gdbm-1.8.0-28.el5 Percona-Server-client-56-5.6.21-rel70.1.el5 percona-release-0.1-3 gdb-7.0.1-45.el5.centos Percona-Server-56-debuginfo-5.6.21-rel70.1.el5 Percona-Server-tokudb-56-5.6.21-rel70.1.el5 $ ps aux |grep mysqld root 2388 0.0 0.1 66124 1368 ? S 12:26 0:00 /bin/sh /usr/bin/mysqld_safe --datadir=/var/lib/mysql --pid-file=/var/lib/mysql/localhost.localdomain.pid mysql 2481 0.6 44.1 926076 453492 ? Sl 12:26 0:00 /usr/sbin/mysqld --basedir=/usr --datadir=/var/lib/mysql --plugin-dir=/usr/lib64/mysql/plugin --user=mysql --log-error=/var/lib/mysql/localhost.localdomain.err --pid-file=/var/lib/mysql/localhost.localdomain.pid root 2766 0.0 0.0 63300 796 pts/0 R+ 12:27 0:00 grep mysqld $ gdb --pid=2481 GNU gdb (GDB) CentOS (7.0.1-45.el5.centos) Copyright (C) 2009 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "x86_64-redhat-linux-gnu". For bug reporting instructions, please see: . Attaching to process 2481 Reading symbols from /usr/sbin/mysqld...Reading symbols from /usr/lib/debug/usr/sbin/mysqld.debug...done. done. Reading symbols from /usr/lib64/libjemalloc.so.1...done. Loaded symbols for /usr/lib64/libjemalloc.so.1 Reading symbols from /lib64/libpthread.so.0...(no debugging symbols found)...done. [Thread debugging using libthread_db enabled] [New Thread 0x2b803584b940 (LWP 2507)] [New Thread 0x2b803580a940 (LWP 2503)] [New Thread 0x2b8034e09940 (LWP 2502)] [New Thread 0x2b8034408940 (LWP 2501)] [New Thread 0x2b8033a07940 (LWP 2500)] [New Thread 0x2b8033006940 (LWP 2499)] [New Thread 0x2b8032605940 (LWP 2498)] [New Thread 0x2b802fe01940 (LWP 2497)] [New Thread 0x2b8031c04940 (LWP 2496)] [New Thread 0x2b8031203940 (LWP 2495)] [New Thread 0x2b8030802940 (LWP 2494)] [New Thread 0x2b802e40a940 (LWP 2492)] [New Thread 0x2b802da09940 (LWP 2491)] [New Thread 0x2b802d008940 (LWP 2490)] [New Thread 0x2b802c607940 (LWP 2489)] [New Thread 0x2b802bc06940 (LWP 2488)] [New Thread 0x2b802b205940 (LWP 2487)] [New Thread 0x2b802a804940 (LWP 2486)] [New Thread 0x2b8029e03940 (LWP 2485)] [New Thread 0x2b8029402940 (LWP 2484)] [New Thread 0x2b8028a01940 (LWP 2483)] [New Thread 0x2b801d81c940 (LWP 2482)] Loaded symbols for /lib64/libpthread.so.0 Reading symbols from /usr/lib64/libaio.so.1...(no debugging symbols found)...done. Loaded symbols for /usr/lib64/libaio.so.1 Reading symbols from /lib64/librt.so.1...(no debugging symbols found)...done. Loaded symbols for /lib64/librt.so.1 Reading symbols from /lib64/libcrypt.so.1...(no debugging symbols found)...done. Loaded symbols for /lib64/libcrypt.so.1 Reading symbols from /lib64/libssl.so.6...(no debugging symbols found)...done. Loaded symbols for /lib64/libssl.so.6 Reading symbols from /lib64/libcrypto.so.6...(no debugging symbols found)...done. Loaded symbols for /lib64/libcrypto.so.6 Reading symbols from /lib64/libdl.so.2...(no debugging symbols found)...done. Loaded symbols for /lib64/libdl.so.2 Reading symbols from /usr/lib64/libstdc++.so.6...(no debugging symbols found)...done. Loaded symbols for /usr/lib64/libstdc++.so.6 Reading symbols from /lib64/libm.so.6...(no debugging symbols found)...done. Loaded symbols for /lib64/libm.so.6 Reading symbols from /lib64/libgcc_s.so.1...(no debugging symbols found)...done. Loaded symbols for /lib64/libgcc_s.so.1 Reading symbols from /lib64/libc.so.6...(no debugging symbols found)...done. Loaded symbols for /lib64/libc.so.6 Reading symbols from /lib64/ld-linux-x86-64.so.2...(no debugging symbols found)...done. Loaded symbols for /lib64/ld-linux-x86-64.so.2 Reading symbols from /usr/lib64/libgssapi_krb5.so.2...(no debugging symbols found)...done. Loaded symbols for /usr/lib64/libgssapi_krb5.so.2 Reading symbols from /usr/lib64/libkrb5.so.3...(no debugging symbols found)...done. Loaded symbols for /usr/lib64/libkrb5.so.3 Reading symbols from /lib64/libcom_err.so.2...(no debugging symbols found)...done. Loaded symbols for /lib64/libcom_err.so.2 Reading symbols from /usr/lib64/libk5crypto.so.3...(no debugging symbols found)...done. Loaded symbols for /usr/lib64/libk5crypto.so.3 Reading symbols from /lib64/libz.so.1...(no debugging symbols found)...done. Loaded symbols for /lib64/libz.so.1 Reading symbols from /usr/lib64/libkrb5support.so.0...(no debugging symbols found)...done. Loaded symbols for /usr/lib64/libkrb5support.so.0 Reading symbols from /lib64/libkeyutils.so.1...(no debugging symbols found)...done. Loaded symbols for /lib64/libkeyutils.so.1 Reading symbols from /lib64/libresolv.so.2...(no debugging symbols found)...done. Loaded symbols for /lib64/libresolv.so.2 Reading symbols from /lib64/libselinux.so.1...(no debugging symbols found)...done. Loaded symbols for /lib64/libselinux.so.1 Reading symbols from /lib64/libsepol.so.1...(no debugging symbols found)...done. Loaded symbols for /lib64/libsepol.so.1 Reading symbols from /lib64/libnss_files.so.2...(no debugging symbols found)...done. Loaded symbols for /lib64/libnss_files.so.2 warning: no loadable sections found in added symbol-file system-supplied DSO at 0x7fff68f79000 0x0000003a212cc0a6 in poll () from /lib64/libc.so.6