我的 Solr 从属实例出现了内存问题。
问题在于每次从服务器复制主服务器的新更改时，从服务器都会启动一个新的搜索器，而旧的搜索器显然不会被释放。
最终，新垃圾收集满了，垃圾溢出到了旧垃圾收集中（或者至少表面上是这样），然后开始持续进行完整的垃圾收集。此时它似乎无法释放任何明显的内存。完整的垃圾收集会导致通常需要几毫秒才能执行的搜索，在大约每 10 秒左右的峰值时间内最多需要 ½-4 秒。
再次，在某个时候，即使老一代也满了，然后它要么停止一切，并设法释放一些内存，要么似乎完全锁定，显然永远不会恢复功能。
一些系统信息：
该机器是 Amazon AWS m1.medium 机器： 操作系统：Ubuntu 12.10 Java： Java servlet：Tomcat 7 Solr：4.0
3.7GB memory
20GB HDD space
1 CPU core
2 ECU (1 ECU is the equivalent CPU capacity of a 1.0-1.2 GHz 2007 Opteron or 2007 Xeon processor).
java version "1.7.0_09"
OpenJDK Runtime Environment (IcedTea7 2.3.3) (7u9-2.3.3-0ubuntu1~12.10.1)
OpenJDK 64-Bit Server VM (build 23.2-b09, mixed mode)
Tomcat启动参数：
-Djava.io.tmpdir=/tmp/tomcat7-tomcat7-tmp
-Dcatalina.home=/usr/share/tomcat7
-Dcatalina.base=/var/lib/tomcat7
-Djava.endorsed.dirs=/usr/share/tomcat7/endorsed
-javaagent:/spm/spm-monitor/lib/spm-monitor-solr-1.8.0-withdeps.jar=/spm/spm-monitor/conf/spm-monitor-config-[snip]-default.xml
-Dcom.sun.management.jmxremote
-Xloggc:/var/log/tomcat7/GCLog.txt
-XX:+PrintGCDetails
-XX:NewSize=500M
-Xmx3G
-Xms3G
-Dsolr.solr.home=/data/solr
-Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager
-XX:+UseConcMarkSweepGC
-Xmx128m
-Djava.awt.headless=true
-Djava.util.logging.config.file=/var/lib/tomcat7/conf/logging.properties
spm-monitor 是来自 SemaText 的监控系统。
Solr 有 4 个核心，4 个国家各一个，包含产品信息。其中 3 个核心包含少量文档，但第 4 个核心包含约 470k 个文档。该核心的索引目前占用 843MB。
这是我的 solrconfig.xml：http://pastebin.com/c5vHKgMF
还有我的schema.xml：http://pastebin.com/tFA4bmT5
我使用 pastebin，因为否则这篇文章会太大。
jstat -gc [pid] 2s各种事件的输出如下：
当 solr 启动时，它运行良好并且所有查询都花费正常时间：
S0C S1C S0U S1U EC EU OC OU PC PU YGC YGCT FGC FGCT GCT
51200.0 51200.0 51200.0 0.0 409600.0 49393.0 2633728.0 751578.5 24896.0 24736.6 4 7.271 0 0.000 7.271
51200.0 51200.0 51200.0 51200.0 409600.0 409600.0 2633728.0 968965.2 24896.0 24826.1 5 7.271 0 0.000 7.271
51200.0 51200.0 0.0 51200.0 409600.0 392671.8 2633728.0 1082530.8 27584.0 27504.1 5 10.459 0 0.000 10.459
51200.0 51200.0 51200.0 51200.0 409600.0 409600.0 2633728.0 1249210.0 27776.0 27578.9 7 11.822 0 0.000 11.822
51200.0 51200.0 51200.0 0.0 409600.0 90674.5 2633728.0 1484383.0 27776.0 27676.6 8 14.380 1 0.064 14.444
51200.0 51200.0 51200.0 0.0 409600.0 333155.3 2633728.0 1484383.0 28544.0 28450.1 8 14.380 1 0.064 14.444
51200.0 51200.0 51200.0 0.0 409600.0 335203.3 2633728.0 1484383.0 28544.0 28453.7 8 14.380 1 0.064 14.444
51200.0 51200.0 51200.0 0.0 409600.0 337251.4 2633728.0 1269719.9 47424.0 28459.8 8 14.380 2 0.542 14.922
51200.0 51200.0 0.0 51200.0 409600.0 1515.0 2633728.0 1347052.7 47424.0 28557.9 9 15.025 2 0.542 15.567
51200.0 51200.0 0.0 51200.0 409600.0 96780.5 2633728.0 1347052.7 47424.0 28634.0 9 15.025 2 0.542 15.567
51200.0 51200.0 0.0 51200.0 409600.0 103202.9 2633728.0 1347052.7 47424.0 28666.7 9 15.025 2 0.542 15.567
51200.0 51200.0 0.0 51200.0 409600.0 103203.1 2633728.0 1347052.7 47424.0 28666.7 9 15.025 2 0.542 15.567
51200.0 51200.0 0.0 51200.0 409600.0 109626.5 2633728.0 1347052.7 47424.0 28668.5 9 15.025 2 0.542 15.567
这是第一次复制。复制后，完整 GC 开始频繁发生，导致搜索暂停 ½-4 秒：
S0C S1C S0U S1U EC EU OC OU PC PU YGC YGCT FGC FGCT GCT
51200.0 51200.0 0.0 51200.0 409600.0 181746.1 2633728.0 1347052.7 47424.0 28745.4 9 15.025 2 0.542 15.567
51200.0 51200.0 0.0 51200.0 409600.0 181746.3 2633728.0 1347052.7 47424.0 28745.4 9 15.025 2 0.542 15.567
51200.0 51200.0 0.0 51200.0 409600.0 186884.2 2633728.0 1347052.7 47424.0 28746.4 9 15.025 2 0.542 15.567
51200.0 51200.0 0.0 51200.0 409600.0 186884.3 2633728.0 1347052.7 47424.0 28746.4 9 15.025 2 0.542 15.567
51200.0 51200.0 0.0 51200.0 409600.0 217818.1 2633728.0 1347052.7 47424.0 28754.1 9 15.025 2 0.542 15.567
51200.0 51200.0 0.0 51200.0 409600.0 217818.3 2633728.0 1347052.7 47424.0 28754.1 9 15.025 2 0.542 15.567
51200.0 51200.0 0.0 51200.0 409600.0 222957.2 2633728.0 1347052.7 47424.0 28754.8 9 15.025 2 0.542 15.567
51200.0 51200.0 0.0 51200.0 409600.0 222957.3 2633728.0 1347052.7 47424.0 28754.8 9 15.025 2 0.542 15.567
51200.0 51200.0 0.0 51200.0 409600.0 229379.7 2633728.0 1347052.7 47424.0 28756.3 9 15.025 2 0.542 15.567
51200.0 51200.0 0.0 51200.0 409600.0 265260.5 2633728.0 1347052.7 47424.0 30313.9 9 15.025 2 0.542 15.567
51200.0 51200.0 0.0 51200.0 409600.0 298923.2 2633728.0 1347052.7 47424.0 31046.5 9 15.025 2 0.542 15.567
51200.0 51200.0 0.0 51200.0 409600.0 301654.4 2633728.0 1347052.7 47424.0 31048.7 9 15.025 2 0.542 15.567
51200.0 51200.0 0.0 51200.0 409600.0 312181.6 2633728.0 1347052.7 47424.0 31051.6 9 15.025 2 0.542 15.567
51200.0 51200.0 0.0 51200.0 409600.0 314912.8 2633728.0 1347052.7 47424.0 31051.6 9 15.025 2 0.542 15.567
51200.0 51200.0 0.0 51200.0 409600.0 324156.0 2633728.0 1347052.7 47424.0 31160.7 9 15.025 2 0.542 15.567
51200.0 51200.0 0.0 51200.0 409600.0 329617.6 2633728.0 1347052.7 47424.0 31299.6 9 15.025 2 0.542 15.567
51200.0 51200.0 0.0 51200.0 409600.0 361996.8 2633728.0 1347052.7 47424.0 31382.4 9 15.025 2 0.542 15.567
51200.0 51200.0 30088.6 0.0 409600.0 217328.7 2633728.0 1398099.4 47424.0 32633.0 10 15.316 2 0.542 15.858
51200.0 51200.0 51200.0 51200.0 409600.0 409600.0 2633728.0 1843888.2 47424.0 32853.0 12 16.800 2 0.542 17.342
51200.0 51200.0 51200.0 51200.0 409600.0 409600.0 2633728.0 2049137.6 47424.0 32864.9 13 19.310 3 0.628 19.938
51200.0 51200.0 0.0 51200.0 409600.0 334292.6 2633728.0 2202213.0 47424.0 32873.8 13 22.241 3 0.628 22.869
51200.0 51200.0 51200.0 51200.0 409600.0 409600.0 2633728.0 2391020.4 47424.0 32876.1 14 22.241 3 0.628 22.869
51200.0 51200.0 51200.0 0.0 409600.0 72530.9 2633728.0 2544393.5 47424.0 32892.1 14 26.071 3 0.628 26.699
51200.0 51200.0 51200.0 0.0 409600.0 84458.3 2633728.0 2520856.9 54832.0 32898.3 14 26.071 5 0.883 26.954
51200.0 51200.0 51200.0 0.0 409600.0 90076.2 2633728.0 2520856.9 54832.0 32899.5 14 26.071 5 1.139 27.210
51200.0 51200.0 51200.0 0.0 409600.0 93651.1 2633728.0 2426346.3 55024.0 32899.9 14 26.071 6 1.387 27.458
51200.0 51200.0 51200.0 0.0 409600.0 102844.1 2633728.0 2426346.3 55024.0 32899.9 14 26.071 7 1.643 27.714
51200.0 51200.0 51200.0 0.0 409600.0 103739.1 2633728.0 2426346.3 55024.0 32901.0 14 26.071 7 1.643 27.714
51200.0 51200.0 51200.0 0.0 409600.0 133067.1 2633728.0 2426242.2 55024.0 32904.8 14 26.071 8 1.899 27.970
51200.0 51200.0 51200.0 0.0 409600.0 133946.5 2633728.0 2426227.6 55024.0 32904.9 14 26.071 9 2.175 28.245
51200.0 51200.0 51200.0 0.0 409600.0 139729.7 2633728.0 2426227.6 55024.0 32907.3 14 26.071 9 2.175 28.245
51200.0 51200.0 51200.0 0.0 409600.0 140141.2 2633728.0 2426227.6 55024.0 32907.3 14 26.071 10 2.175 28.245
51200.0 51200.0 51200.0 0.0 409600.0 146923.3 2633728.0 2426226.6 55024.0 32909.0 14 26.071 11 2.761 28.831
51200.0 51200.0 51200.0 0.0 409600.0 148190.4 2633728.0 2426226.6 55024.0 32909.3 14 26.071 11 2.761 28.831
51200.0 51200.0 51200.0 0.0 409600.0 162871.6 2633728.0 2426176.5 55024.0 32912.4 14 26.071 12 3.062 29.132
51200.0 51200.0 51200.0 0.0 409600.0 164115.7 2633728.0 2426176.5 55024.0 32912.4 14 26.071 13 3.375 29.445
51200.0 51200.0 51200.0 0.0 409600.0 169801.3 2633728.0 2426167.1 55024.0 32912.6 14 26.071 14 3.677 29.747
51200.0 51200.0 51200.0 0.0 409600.0 170464.9 2633728.0 2426167.0 55024.0 32913.0 14 26.071 15 3.978 30.048
51200.0 51200.0 51200.0 0.0 409600.0 176939.4 2633728.0 2426167.0 55024.0 32913.3 14 26.071 16 4.292 30.363
51200.0 51200.0 51200.0 0.0 409600.0 177982.8 2633728.0 2426167.0 55024.0 32916.8 14 26.071 17 4.602 30.673
51200.0 51200.0 51200.0 0.0 409600.0 207087.6 2633728.0 2426167.0 55024.0 32919.0 14 26.071 18 4.952 31.022
51200.0 51200.0 51200.0 0.0 409600.0 207915.5 2633728.0 2426167.0 55024.0 32920.0 14 26.071 19 5.289 31.359
51200.0 51200.0 51200.0 0.0 409600.0 213503.3 2633728.0 2426167.0 55024.0 32922.7 14 26.071 20 5.641 31.711
51200.0 51200.0 51200.0 0.0 409600.0 214918.9 2633728.0 2426167.0 55024.0 32922.9 14 26.071 21 6.053 32.124
51200.0 51200.0 51200.0 0.0 409600.0 221854.4 2633728.0 2426167.0 55024.0 32922.9 14 26.071 21 6.053 32.124
51200.0 51200.0 51200.0 0.0 409600.0 222649.1 2633728.0 2426167.0 55024.0 32922.9 14 26.071 23 6.763 32.834
51200.0 51200.0 51200.0 0.0 409600.0 228783.4 2633728.0 2426167.0 55024.0 32923.9 14 26.071 23 6.763 32.834
51200.0 51200.0 51200.0 0.0 409600.0 229735.2 2633728.0 2426149.5 55024.0 32924.7 14 26.071 25 7.521 33.591
51200.0 51200.0 51200.0 0.0 409600.0 235296.9 2633728.0 2426149.5 55024.0 32925.6 14 26.071 25 7.521 33.591
51200.0 51200.0 51200.0 0.0 409600.0 236130.0 2633728.0 2426149.4 55024.0 32925.6 14 26.071 27 8.260 34.331
51200.0 51200.0 51200.0 0.0 409600.0 243076.6 2633728.0 2426149.4 55024.0 32925.6 14 26.071 27 8.260 34.331
51200.0 51200.0 51200.0 0.0 409600.0 243960.8 2633728.0 2426149.4 55024.0 32926.3 14 26.071 29 9.029 35.100
51200.0 51200.0 51200.0 0.0 409600.0 273105.0 2633728.0 2426149.4 55024.0 32930.8 14 26.071 29 9.029 35.100
51200.0 51200.0 51200.0 0.0 409600.0 274353.8 2633728.0 2425918.4 55024.0 32932.0 14 26.071 31 9.436 35.507
51200.0 51200.0 51200.0 0.0 409600.0 279947.9 2633728.0 2425918.4 55024.0 32932.1 14 26.071 31 9.842 35.913
51200.0 51200.0 51200.0 0.0 409600.0 280804.8 2633728.0 2425853.6 55024.0 32932.1 14 26.071 32 10.258 36.329
51200.0 51200.0 51200.0 0.0 409600.0 288224.7 2633728.0 2425853.6 55024.0 32932.1 14 26.071 33 10.669 36.740
51200.0 51200.0 51200.0 0.0 409600.0 288924.5 2633728.0 2425801.3 55024.0 32932.1 14 26.071 34 11.086 37.157
51200.0 51200.0 51200.0 0.0 409600.0 294579.7 2633728.0 2425801.3 55024.0 32932.1 14 26.071 35 11.496 37.567
51200.0 51200.0 51200.0 0.0 409600.0 295011.3 2633728.0 2425756.8 55024.0 32932.3 14 26.071 36 11.937 38.007
51200.0 51200.0 51200.0 0.0 409600.0 300928.6 2633728.0 2425749.2 55024.0 32932.3 14 26.071 37 12.364 38.434
51200.0 51200.0 51200.0 0.0 409600.0 302173.1 2633728.0 2425749.2 55024.0 32932.3 14 26.071 38 12.794 38.865
51200.0 51200.0 51200.0 0.0 409600.0 309040.9 2633728.0 2425748.9 55024.0 32932.7 14 26.071 39 13.221 39.291
51200.0 51200.0 51200.0 0.0 409600.0 309776.0 2633728.0 2425748.9 55024.0 32932.7 14 26.071 40 13.221 39.291
51200.0 51200.0 51200.0 0.0 409600.0 338791.4 2633728.0 2425748.9 55024.0 32937.5 14 26.071 41 14.111 40.182
51200.0 51200.0 51200.0 0.0 409600.0 339363.3 2633728.0 2425748.9 55024.0 32937.5 14 26.071 41 14.111 40.182
这是第二次复制，所有内容几乎都锁定了。此时，所有查询至少需要 30 秒：
S0C S1C S0U S1U EC EU OC OU PC PU YGC YGCT FGC FGCT GCT
51200.0 51200.0 0.0 0.0 409600.0 104445.7 2633728.0 2264909.9 55024.0 32909.4 15 26.071 68 33.808 59.879
51200.0 51200.0 0.0 0.0 409600.0 131077.9 2633728.0 2264909.9 55024.0 32912.0 15 26.071 69 33.902 59.973
51200.0 51200.0 0.0 0.0 409600.0 131078.1 2633728.0 2264909.9 55024.0 32912.0 15 26.071 69 33.902 59.973
51200.0 51200.0 0.0 51200.0 409600.0 0.0 2633728.0 2313467.9 55024.0 32925.0 16 26.533 70 34.030 60.563
51200.0 51200.0 51200.0 0.0 409600.0 272264.2 2633728.0 2621778.0 55024.0 32925.4 17 28.589 71 34.113 62.702
51200.0 51200.0 51200.0 0.0 409600.0 409600.0 2633728.0 2621778.0 55024.0 32925.7 18 28.589 72 34.113 62.702
51200.0 51200.0 51200.0 0.0 409600.0 409600.0 2633728.0 2621778.0 55024.0 32925.7 18 28.589 72 34.113 62.702
51200.0 51200.0 51200.0 0.0 409600.0 409600.0 2633728.0 2621778.0 55024.0 32925.7 18 28.589 72 34.113 62.702
51200.0 51200.0 51200.0 0.0 409600.0 409600.0 2633728.0 2621778.0 55024.0 32925.7 18 28.589 72 34.113 62.702
51200.0 51200.0 51200.0 0.0 409600.0 409600.0 2633728.0 2633728.0 55024.0 32929.0 18 28.589 74 56.386 84.975
51200.0 51200.0 51200.0 0.0 409600.0 409600.0 2633728.0 2633728.0 55024.0 32929.0 18 28.589 74 56.386 84.975
51200.0 51200.0 51200.0 0.0 409600.0 409600.0 2633728.0 2633728.0 55024.0 32929.0 18 28.589 74 56.386 84.975
51200.0 51200.0 51200.0 0.0 409600.0 409600.0 2633728.0 2633728.0 55024.0 32929.0 18 28.589 74 56.386 84.975
51200.0 51200.0 51200.0 0.0 409600.0 409600.0 2633728.0 2633728.0 55024.0 32929.0 18 28.589 74 56.386 84.975
51200.0 51200.0 51200.0 0.0 409600.0 409600.0 2633728.0 2633728.0 55024.0 32935.0 18 28.589 76 80.943 109.532
51200.0 51200.0 51200.0 0.0 409600.0 409600.0 2633728.0 2633728.0 55024.0 32935.0 18 28.589 76 80.943 109.532
51200.0 51200.0 51200.0 0.0 409600.0 409600.0 2633728.0 2633728.0 55024.0 32935.0 18 28.589 76 80.943 109.532
51200.0 51200.0 51200.0 0.0 409600.0 409600.0 2633728.0 2633728.0 55024.0 32935.0 18 28.589 76 80.943 109.532
51200.0 51200.0 51200.0 0.0 409600.0 409600.0 2633728.0 2633728.0 55024.0 32935.0 18 28.589 76 80.943 109.532
51200.0 51200.0 24901.3 0.0 409600.0 409600.0 2633728.0 2633728.0 55024.0 32935.0 18 28.589 77 105.639 134.229
51200.0 51200.0 51199.5 0.0 409600.0 409600.0 2633728.0 2633728.0 55024.0 32935.2 18 28.589 78 106.270 134.859
51200.0 51200.0 51199.5 0.0 409600.0 409600.0 2633728.0 2633728.0 55024.0 32935.2 18 28.589 78 106.270 134.859
51200.0 51200.0 51199.5 0.0 409600.0 409600.0 2633728.0 2633728.0 55024.0 32935.2 18 28.589 78 106.270 134.859
51200.0 51200.0 51199.5 0.0 409600.0 409600.0 2633728.0 2633728.0 55024.0 32935.2 18 28.589 78 106.270 134.859
51200.0 51200.0 37977.0 0.0 409600.0 409600.0 2633728.0 2633728.0 55024.0 32935.7 18 28.589 79 130.681 159.270
51200.0 51200.0 51200.0 0.0 409600.0 409600.0 2633728.0 2633728.0 55024.0 32936.2 18 28.589 80 131.342 159.932
51200.0 51200.0 51200.0 0.0 409600.0 409600.0 2633728.0 2633728.0 55024.0 32936.2 18 28.589 80 131.342 159.932
51200.0 51200.0 51200.0 0.0 409600.0 409600.0 2633728.0 2633728.0 55024.0 32936.2 18 28.589 80 131.342 159.932
51200.0 51200.0 51200.0 0.0 409600.0 409600.0 2633728.0 2633728.0 55024.0 32936.2 18 28.589 80 131.342 159.932
51200.0 51200.0 44939.3 0.0 409600.0 409600.0 2633728.0 2633728.0 55024.0 32936.2 18 28.589 81 155.284 183.874
51200.0 51200.0 51200.0 0.0 409600.0 409600.0 2633728.0 2633728.0 55024.0 32936.2 18 28.589 82 155.957 184.547
51200.0 51200.0 51200.0 0.0 409600.0 409600.0 2633728.0 2633728.0 55024.0 32936.2 18 28.589 82 155.957 184.547
51200.0 51200.0 51200.0 0.0 409600.0 409600.0 2633728.0 2633728.0 55024.0 32936.2 18 28.589 82 155.957 184.547
51200.0 51200.0 51200.0 0.0 409600.0 409600.0 2633728.0 2633728.0 55024.0 32936.2 18 28.589 82 155.957 184.547
51200.0 51200.0 51200.0 0.0 409600.0 409600.0 2633728.0 2633728.0 55024.0 32936.2 18 28.589 82 155.957 184.547
51200.0 51200.0 51199.9 0.0 409600.0 409600.0 2633728.0 2633728.0 55024.0 32936.2 18 28.589 84 181.848 210.437
51200.0 51200.0 51199.9 0.0 409600.0 409600.0 2633728.0 2633728.0 55024.0 32936.2 18 28.589 84 181.848 210.437
51200.0 51200.0 51199.9 0.0 409600.0 409600.0 2633728.0 2633728.0 55024.0 32936.2 18 28.589 84 181.848 210.437
51200.0 51200.0 51199.9 0.0 409600.0 409600.0 2633728.0 2633728.0 55024.0 32936.2 18 28.589 84 181.848 210.437
51200.0 51200.0 51199.9 0.0 409600.0 409600.0 2633728.0 2633728.0 55024.0 32922.9 18 28.589 84 181.848 210.437
51200.0 51200.0 51199.9 0.0 409600.0 409600.0 2633728.0 2633727.9 55024.0 32922.9 18 28.589 85 206.950 235.539
51200.0 51200.0 51199.9 0.0 409600.0 409600.0 2633728.0 2633727.9 55024.0 32922.9 18 28.589 85 206.950 235.539
51200.0 51200.0 51199.9 0.0 409600.0 409600.0 2633728.0 2633727.9 55024.0 32922.9 18 28.589 85 206.950 235.539
51200.0 51200.0 51109.1 0.0 409600.0 409600.0 2633728.0 2633728.0 55024.0 32919.2 18 28.589 86 224.879 253.469
51200.0 51200.0 51200.0 0.0 409600.0 409600.0 2633728.0 2633728.0 55024.0 32919.2 18 28.589 87 225.545 254.135
51200.0 51200.0 51200.0 0.0 409600.0 409600.0 2633728.0 2633728.0 55024.0 32919.2 18 28.589 87 225.545 254.135
51200.0 51200.0 51200.0 0.0 409600.0 409600.0 2633728.0 2633728.0 55024.0 32919.2 18 28.589 87 225.545 254.135
51200.0 51200.0 51200.0 0.0 409600.0 409600.0 2633728.0 2633728.0 55024.0 32919.2 18 28.589 87 225.545 254.135
51200.0 51200.0 51200.0 0.0 409600.0 409600.0 2633728.0 2633728.0 55024.0 32914.3 18 28.589 87 225.545 254.135
51200.0 51200.0 51194.9 0.0 409600.0 409600.0 2633728.0 2633727.9 55024.0 32914.5 18 28.589 88 250.623 279.213
51200.0 51200.0 51194.9 0.0 409600.0 409600.0 2633728.0 2633727.9 55024.0 32914.5 18 28.589 88 250.623 279.213
51200.0 51200.0 51194.9 0.0 409600.0 409600.0 2633728.0 2633727.9 55024.0 32901.1 18 28.589 88 250.623 279.213
51200.0 51200.0 51200.0 0.0 409600.0 409600.0 2633728.0 2633728.0 55024.0 32901.1 18 28.589 89 266.103 294.693
51200.0 51200.0 51200.0 0.0 409600.0 409600.0 2633728.0 2633728.0 55024.0 32901.1 18 28.589 89 266.103 294.693
51200.0 51200.0 51200.0 0.0 409600.0 409600.0 2633728.0 2633728.0 55024.0 32901.1 18 28.589 89 266.103 294.693
51200.0 51200.0 51184.2 0.0 409600.0 409600.0 2633728.0 2633727.9 55024.0 32901.1 18 28.589 91 284.683 313.272
51200.0 51200.0 51184.2 0.0 409600.0 409600.0 2633728.0 2633727.9 55024.0 32901.1 18 28.589 91 284.683 313.272
51200.0 51200.0 51184.2 0.0 409600.0 409600.0 2633728.0 2633727.9 55024.0 32901.1 18 28.589 91 284.683 313.272
51200.0 51200.0 51184.2 0.0 409600.0 409600.0 2633728.0 2633727.9 55024.0 32901.1 18 28.589 91 284.683 313.272
51200.0 51200.0 51184.2 0.0 409600.0 409600.0 2633728.0 2633727.9 55024.0 32901.1 18 28.589 91 284.683 313.272
51200.0 51200.0 51199.9 0.0 409600.0 409600.0 2633728.0 2633728.0 55024.0 32901.3 18 28.589 92 309.958 338.547
51200.0 51200.0 51199.9 0.0 409600.0 409600.0 2633728.0 2633728.0 55024.0 32901.3 18 28.589 92 309.958 338.547
51200.0 51200.0 51199.9 0.0 409600.0 409600.0 2633728.0 2633728.0 55024.0 32901.3 18 28.589 92 309.958 338.547
输出jstat -gccause [pid]显示以下内容：
S0 S1 E O P YGC YGCT FGC FGCT GCT LGCC GCC
100.00 0.00 100.00 100.00 59.79 18 28.589 94 327.704 356.293 Allocation Failure Allocation Failure
我还转储了一次它停止甚至无法响应搜索时的堆，因此如果有人想要一些输出，jhat我可以提供它。
有人知道为什么 solr/tomcat/java 会这样做吗？我可以一致地复制它，因此如果您需要更多调试信息，我也可以提供。
答案1
-Xmx3G
-Xms3G
-Dsolr.solr.home=/data/solr
-Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager
-XX:+UseConcMarkSweepGC
-Xmx128m
为什么有两个最大堆设置？是复制粘贴错误吗？还是你的 tomcat 配置方式？另外，请查看是否可以将最小堆减少到 512M 或 1G。一般不鼓励使用相同的最小堆和最大堆大小。