开源图数据库NebulaGraphOOM的问题分析与解决

紫京城孤

生成 jeprof.*heap 文件进行内存占用量分析参考命令如下：MALLOC_CONF="prof:true,lg_prof_interval:26" LD_PRELOAD="/usr/lib64/libjemalloc.so.2" /usr/local/nebula/bin/nebula-storaged --flagfile /usr/local/nebula/etc/nebula-storaged.conf通过 jeprof 读取生成的 jeprof.*heap 文件jeprof /usr/local/nebula/bin/nebula-storaged jeprof.5327.*(jeprof) topTotal: 18903464.5 MB13371403.1 70.7% 70.7% 13371403.1 70.7% rocksdb::UncompressBlockContentsForCompressionType5503821.4 29.1% 99.9% 18875224.5 99.9% rocksdb::BlockFetcher::ReadBlockContents 5923.5 0.0% 99.9% 6518.4 0.0% rocksdb:RUCacheShard::Insert 4704.0 0.0% 99.9% 4704.0 0.0% std::__cxx11::basic_string::_M_mutate 3257.7 0.0% 99.9% 10664.1 0.1% rocksdb::BlockBasedTable:utDataBlockToCache 2964.1 0.0% 99.9% 3261.7 0.0% std::__detail::_Map_base:perator[] 2085.1 0.0% 100.0% 2085.1 0.0% rocksdb::VersionBuilder::Rep::ApplyFileAddition 1714.6 0.0% 100.0% 1714.6 0.0% std::_Rb_tree::_M_insert_unique 1483.0 0.0% 100.0% 1783.5 0.0% nebula::meta::MetaClient::loadSessions 888.5 0.0% 100.0% 18892273.5 99.9% rocksdb::BlockBasedTable::Open