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[CASSANDRA-10855] Use Caffeine (W-TinyLFU) for on-heap caches - Cassandra - [issue]
...Cassandra currently uses ConcurrentLinkedHashMap for performance critical caches (key, counter) and Guava's cache for non-critical (auth, metrics, security). All of these usages have been re...    Author: Ben Manes , 2020-05-15, 08:04
[PDFBOX-4774] Add AWS Lambda support to FontFileFinder - PDFBox - [issue]
...The font directory finder is hard coded based on the operating system and is not directly extensible. Instead, if I understand correctly, the fonts have to be explicitly declared in a PDFBox...    Author: Ben Manes , 2020-02-15, 09:55
[PDFBOX-4726] PDFRenderer uses excessive memory - PDFBox - [issue]
...PDFRenderer.renderImage uses BufferedImage with only in-memory data. This is uncompressed and can use excessive memory. This occurs despite setting MemoryUsageSetting being configured on the...    Author: Ben Manes , 2020-01-28, 05:17
[PDFBOX-4396] Memory leak due to soft reference caching - PDFBox - [issue]
...In a heap dump, it appears that DefaultResourceCache is retaining 5.3 GB of memory due to buffered images (via PDImageXObject). I suspect that G1 is not collecting soft references across all...    Author: Ben Manes , 2019-12-22, 17:09
[LUCENE-9038] Improve LruQueryCache's concurrency - Lucene - [issue]
...LRUQueryCache appears to play a central role in Lucene's performance. There are many issues discussing its performance, such as LUCENE-7235, LUCENE-7237, LUCENE-8027, LUCENE-8213, and LUCENE...    Author: Ben Manes , 2019-11-26, 04:20
[PDFBOX-4668] Add ResourceCacheFactory as global setting - PDFBox - [issue]
...Image rendering is cached by DefaultResourceCache per-document using soft references. As described in the FAQ, this can lead to an OutOfMemoryError when processing, e.g. many documents in pa...    Author: Ben Manes , 2019-10-10, 18:13
[SOLR-8241] Evaluate W-TinyLfu cache - Solr - [issue]
...SOLR-2906 introduced an LFU cache and in-progress SOLR-3393 makes it O(1). The discussions seem to indicate that the higher hit rate (vs LRU) is offset by the slower performance of the imple...    Author: Ben Manes , 2019-10-04, 06:13
[OFBIZ-6747] Replace ConcurrentLinkedHashMap by Caffeine - OFBiz - [issue]
...Similar to OFBIZ-3779, please consider upgrading the library used by UtilCache (v1.2). The current version is 1.4.2 and is the last major release planned.The preferable alternative would be ...    Author: Ben Manes , 2019-05-21, 15:50
[HBASE-15560] TinyLFU-based BlockCache - HBase - [issue]
...LruBlockCache uses the Segmented LRU (SLRU) policy to capture frequency and recency of the working set. It achieves concurrency by using an O( n ) background thread to prioritize the entries...    Author: Ben Manes , 2019-04-18, 01:06
[CASSANDRA-2681] Upgrade ConcurrentLinkedHashMap (v1.2) - Cassandra - [issue]
...This release has numerous performance improvements. See the change log for details.It also includes a few useful features that may be of interest, Snapshot iteration in order of hotness (CAS...    Author: Ben Manes , 2019-03-12, 14:02