* improve the formatting for precise ms in DateCache
* return original format string with DateCache.getFormatString
* calculate index in tick constructor because format strings can be different size
* use two ticks so that switching between seconds is less likely going to have cache miss
* use boolean instead of index to denote if sub second is needed
* remove formatWithoutCache and replace with doFormat as it doesn't work with sub second time
* allow the option of not having sub second precision
* use two separate formatters for the prefix/suffix around the SSS format code
* use a simple class to store both ticks in DateCache
* rename DateCache.Tick.getString(long) to format()
Signed-off-by: Lachlan Roberts <lachlan@webtide.com>
Introduced `QueuedThreadPool.maxEvictCount` to be the number of idle threads that are evicted in one idle timeout.
When set to 1 (the default), the old behavior is reproduced: expiring 1 thread every idle timeout.
When set to larger values, allows to keep around the threads for the idle timeout (in case of further load spikes), but allows to quickly recover OS memory when they are truly idle.
For example, with 2000 threads, 30 seconds idle timeout and idleTimeoutMaxShrinkCount=1, it will take 995 minutes (about 16.5 hrs) to shrink the pool back to 10 threads.
By setting idleTimeoutMaxShrinkCount=100, the thread pool can be shrunk to 10 threads in about 10 minutes.
Note also that the new algorithm is more aggressive at shrinking the thread pool.
Previously, a small load might have been sufficient to never evict any thread, because all threads could take turns at executing jobs so that threads were mostly idle but would never really idle time out.
The new algorithm is more aggressive even in presence of a small load, so that if `minThreads` are sufficient to cope with the small load, then the other threads are evicted.
Signed-off-by: Simone Bordet <simone.bordet@gmail.com>
Signed-off-by: gregw <gregw@webtide.com>
Signed-off-by: Ludovic Orban <lorban@bitronix.be>
Co-authored-by: gregw <gregw@webtide.com>
Co-authored-by: Ludovic Orban <lorban@bitronix.be>
* Updating to version 10.0.12
* Updating to version 10.0.13-SNAPSHOT
* VERSION.TXT =+ content of jetty-9.4.49.v20220914 release
* remove strange line and reorder
Rename EWYK to AdaptiveExecutionStrategy, which better represents the nature of the strategy.
Updated the documentation
Refactored substrategy selection for code clarity.
Added notes about chaining strategies and thread starvation
Signed-off-by: Greg Wilkins <gregw@webtide.com>
Signed-off-by: Simone Bordet <simone.bordet@gmail.com>
Co-authored-by: Simone Bordet <simone.bordet@gmail.com>
Joakim Erdfelt
Olivier Lamy
Lachlan
Jan Bartel
Simone Bordet
gregw
Olivier Lamy
Ludovic Orban
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