*Solr prod stopped yesterday. How to prevent this.* Solr heap info is : -Xms20g -Xmx20g JVM Heap info. : -Xms528m -Xmx8g Physical Ram - 32GB Solr version - 6.6.1 Swap memory - 8g
*hc_err_pid.log got created with following info in it:* # # There is insufficient memory for the Java Runtime Environment to continue. # Native memory allocation (mmap) failed to map 16106127360 bytes for committing reserved memory. # Possible reasons: # The system is out of physical RAM or swap space # The process is running with CompressedOops enabled, and the Java Heap may be blocking the growth of the native heap # Possible solutions: # Reduce memory load on the system # Increase physical memory or swap space # Check if swap backing store is full # Decrease Java heap size (-Xmx/-Xms) # Decrease number of Java threads # Decrease Java thread stack sizes (-Xss) # Set larger code cache with -XX:ReservedCodeCacheSize= # This output file may be truncated or incomplete. # # Out of Memory Error (os_linux.cpp:2749), pid=86291, tid=0x00007f8822e47700 # # JRE version: (8.0_211-b12) (build ) # Java VM: Java HotSpot(TM) 64-Bit Server VM (25.211-b12 mixed mode linux-amd64 compressed oops) # Failed to write core dump. Core dumps have been disabled. To enable core dumping, try "ulimit -c unlimited" before starting Java again # *solr_gc.log shows following:* 2019-10-23T01:24:23.688+0530: 644433.457: Total time for which application threads were stopped: 0.0028257 seconds, Stopping threads took: 0.0016863 seconds Heap par new generation total 4369088K, used 736363K [0x00000002c0000000, 0x0000000400000000, 0x0000000400000000) eden space 3495296K, 13% used [0x00000002c0000000, 0x00000002dc9d5ed8, 0x0000000395560000) from space 873792K, 30% used [0x00000003caab0000, 0x00000003daff4d80, 0x0000000400000000) to space 873792K, 0% used [0x0000000395560000, 0x0000000395560000, 0x00000003caab0000) concurrent mark-sweep generation total 15728640K, used 3807001K [0x0000000400000000, 0x00000007c0000000, 0x00000007c0000000) Metaspace used 45325K, capacity 47047K, committed 47324K, reserved 1091584K class space used 4821K, capacity 5230K, committed 5340K, reserved 1048576K
