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運行包含上限集合的副本集時是否有問題?MongoDB限制集合複製和非常高的CPU使用率
出於某種原因,我的副本集上的其中一個輔助節點定期處於90%CPU幾小時。
闖入它gdb
顯示以下堆棧跟蹤幾乎所有的時間:
#0 0x00000000008c3e3a in mongo::ps::Rolling::access(unsigned long, short, bool)()
#1 0x00000000008c3bd6 in mongo::Record::accessed()()
#2 0x000000000086eb03 in mongo::CoveredIndexMatcher::matches(mongo::BSONObj const&, mongo::DiskLoc const&, mongo::MatchDetails*, bool)()
#3 0x000000000086ed78 in mongo::CoveredIndexMatcher::matchesCurrent(mongo::Cursor*, mongo::MatchDetails*)()
#4 0x00000000009794dc in mongo::UpdateOp::next()()
#5 0x00000000008c9a96 in mongo::QueryPlanSet::Runner::nextOp(mongo::QueryOp&)()
#6 0x00000000008d9930 in mongo::QueryPlanSet::Runner::next()()
#7 0x00000000008d9f86 in mongo::QueryPlanSet::Runner::runUntilFirstCompletes()()
#8 0x00000000008ddc3e in mongo::QueryPlanSet::runOp(mongo::QueryOp&)()
#9 0x00000000008df5f5 in mongo::MultiPlanScanner::runOpOnce(mongo::QueryOp&)()
#10 0x00000000008dfaf0 in mongo::MultiCursor::nextClause()()
#11 0x00000000008e1bcd in mongo::MultiCursor::MultiCursor(char const*, mongo::BSONObj const&, mongo::BSONObj const&, boost::shared_ptr<mongo::MultiCursor::CursorOp>, bool)()
#12 0x000000000095f542 in mongo::_updateObjects(bool, char const*, mongo::BSONObj const&, mongo::BSONObj, bool, bool, bool, mongo::OpDebug&, mongo::RemoveSaver*)()
#13 0x00000000009642d5 in mongo::updateObjects(char const*, mongo::BSONObj const&, mongo::BSONObj, bool, bool, bool, mongo::OpDebug&)()
#14 0x00000000008339cf in mongo::applyOperation_inlock(mongo::BSONObj const&, bool)()
#15 0x00000000008232cb in mongo::ReplSetImpl::syncApply(mongo::BSONObj const&)()
#16 0x0000000000826f65 in mongo::ReplSetImpl::syncTail()()
#17 0x00000000008283e5 in mongo::ReplSetImpl::_syncThread()()
#18 0x0000000000828438 in mongo::ReplSetImpl::syncThread()()
#19 0x00000000008288d0 in mongo::startSyncThread()()
#20 0x0000000000aabd90 in thread_proxy()
#21 0x00007effd9cd09ca in start_thread() from /lib/libpthread.so.0
#22 0x00007effd927fcdd in clone() from /lib/libc.so.6
有一些額外的法寶之一,需要以用得到封頂收藏複製嗎?
謝謝。我已經添加了一個索引,但我不確定它是否是唯一的索引。我相信_id是自動生成的 - 我如何確保它在現有的加蓋集合上是唯一的? –
當您添加它時,在索引選項中指定unique:true。 – kristina