What's is Wait event 'checkpoint worker waiting for wakeup from parent'?

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Adaptive Server Enterprise/15.7.0/EBF 22639 SMP SP52 /P/Sun_svr4/OS 5.10/ase157sp5x/3293/64-bit/FBO/Wed May 21 02:49:14 2014

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Good afternoon,

I'm looking at the top 10 WaitEvent system-wide in table monSysWaits and I noticed the WaitEvent 'checkpoint worker waiting for wakeup from parent'

I couldn't find any description in Sybase infocenter.

Does anyone have some information about it and whether I should worry if the value is high?

Thanks

Simon