Oracle gratefully acknowledges the following contributions from Google, Inc. to improve InnoDB performance:
Replacing InnoDB's use of Pthreads mutexes with calls to GCC atomic builtins, as discussed in Section 14.5.7, “InnoDB Mutex and Read/Write Lock Implementation”. This change means that InnoDB mutex and rw-lock operations take less CPU time, and improves throughput on those platforms where the atomic operations are available.
Controlling master thread
I/O rate, as
Section 14.6.7, “Configuring the InnoDB Master Thread I/O Rate”. The
master thread in InnoDB is a thread that performs various
tasks in the background. Historically, InnoDB has used a hard
coded value as the total
I/O capacity of
the server. With this change, user can control the number of
I/O operations that can be performed per
second based on their own workload.
Changes from the Google contributions were incorporated in the
following source code files:
These contributions are incorporated subject to the conditions
contained in the file
COPYING.Google, which are
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