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SystemTap is production supported in Redhat EL5.4

If you don’t know what SystemTap is – it’s the Linux world’s attempt to build Solaris DTrace style safe dynamic instrumentation into Linux kernel.
I’m not going into religious discussions which one is better here, I have used both SystemTap and DTrace successfully for diagnosing low level issues inside OS kernel, so both are good enough for me :)
The problem with SystemTap though has been that it’s not production quality, it’s rather been a technology preview.