zhu chen created POOL-350:
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Summary: Add option for not executing "hasBorrowWaiters()" while
returning objects
Key: POOL-350
URL: https://issues.apache.org/jira/browse/POOL-350
Project: Commons Pool
Issue Type: Wish
Affects Versions: 2.6.0
Environment: h5. uname -a:
Linux VMS26239 3.10.0-229.11.1.el7.x86_64 #1 SMP Thu Aug 6 01:06:18 UTC 2015
x86_64 x86_64 x86_64 GNU/Linux
*Java version:*
java version "1.8.0_60"
Java(TM) SE Runtime Environment (build 1.8.0_60-b27)
Java HotSpot(TM) 64-Bit Server VM (build 25.60-b23, mixed mode)
Reporter: zhu chen
h2. Phenomena:
I'm recently leveraging commons-pool as my Redis connection pool in my project,
however, the pain is that when my system is dealing with over thousands of
Redises, CPU load become such high. By checking JVM through
JFR(FlightRecorder), it turned out the hot method was
"{color:#FF0000}hasBorrowWaiters(){color}", which is invoked by
"{color:#FF0000}returnObject(){color}" each time.
That means the system will go through over *thousands*(the number will grow as
well as my system) of keys after *each* object's *return*, what's worse, the
program is running concurrently, which, obviously cause a huge CPU load.
h2. Expect:
I was wondering if we could add a config for optionally run this
"hasBorrowWaiters()" each time when we return an object.
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