Today (Saturday) We will make some minor tuning adjustments to MySQL.

You may experience 2 up to 10 seconds "glitch time" when we restart MySQL. We expect to make these adjustments around 1AM Eastern Daylight Saving Time (EDT) US.

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FreeBSD 11.0 - man page for aio_suspend (freebsd section 2)

AIO_SUSPEND(2)						      BSD System Calls Manual						    AIO_SUSPEND(2)

aio_suspend -- suspend until asynchronous I/O operations or timeout complete (REALTIME)
Standard C Library (libc, -lc)
#include <aio.h> int aio_suspend(const struct aiocb *const iocbs[], int niocb, const struct timespec *timeout);
The aio_suspend() system call suspends the calling process until at least one of the specified asynchronous I/O requests have completed, a signal is delivered, or the timeout has passed. The iocbs argument is an array of niocb pointers to asynchronous I/O requests. Array members containing null pointers will be silently ignored. If timeout is not a null pointer, it specifies a maximum interval to suspend. If timeout is a null pointer, the suspend blocks indefinitely. To effect a poll, the timeout should point to a zero-value timespec structure.
If one or more of the specified asynchronous I/O requests have completed, aio_suspend() returns 0. Otherwise it returns -1 and sets errno to indicate the error, as enumerated below.
The aio_suspend() system call will fail if: [EAGAIN] the timeout expired before any I/O requests completed. [EINVAL] The iocbs argument contains more than AIO_LISTIO_MAX asynchronous I/O requests, or at least one of the requests is not valid. [EINTR] the suspend was interrupted by a signal.
aio_cancel(2), aio_error(2), aio_return(2), aio_waitcomplete(2), aio_write(2), aio(4)
The aio_suspend() system call is expected to conform to the IEEE Std 1003.1 (``POSIX.1'') standard.
The aio_suspend() system call first appeared in FreeBSD 3.0.
This manual page was written by Wes Peters <>.
June 2, 1999 BSD

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