PostgreSQL啟動恢複通過checkpoint open wal檔案

來源:互聯網
上載者:User

標籤:ESS   ble   logfile   bin   post   ntp   tar   ==   code   

StartupLOG::->record = ReadCheckpointRecord(xlogreader, ControlFile->checkPoint, 1, true)->record = ReadRecord(xlogreader, ControlFile->checkPoint, LOG, true)->record = XLogReadRecord(xlogreader, ControlFile->checkPoint, &errormsg);->readOff = ReadPageInternal(state,ControlFile->checkPoint - (ControlFile->checkPoint % XLOG_BLCKSZ), Min(ontrolFile->checkPoint % XLOG_BLCKSZ + SizeOfXLogRecord, XLOG_BLCKSZ));->|--pageptr=ControlFile->checkPoint - (ControlFile->checkPoint % XLOG_BLCKSZ) |--targetPageOff = (pageptr % XLogSegSize);//段檔案位移 |--targetSegmentPtr = pageptr - targetPageOff; |--readLen = state->read_page(state, targetSegmentPtr(0?), XLOG_BLCKSZ,ControlFile->checkPoint, state->readBuf, &state->readPageTLI);->WaitForWALToBecomeAvailable(targetSegmentPtr(0?) + XLOG_BLCKSZ,private->randAccess,1,targetRecPtr)->readFile = XLogFileReadAnyTLI(targetSegmentPtr/XLogSegSize, DEBUG2,currentSource == XLOG_FROM_ARCHIVE ? XLOG_FROM_ANY :currentSource)->fd = XLogFileRead(segno, emode, tli,XLOG_FROM_ARCHIVE或者XLOG_FROM_PG_WAL, true)->fd = BasicOpenFile(path, O_RDONLY | PG_BINARY, 0);->fd = open(fileName, fileFlags, fileMode)

PostgreSQL啟動恢複通過checkpoint open wal檔案

相關文章

聯繫我們

該頁面正文內容均來源於網絡整理,並不代表阿里雲官方的觀點,該頁面所提到的產品和服務也與阿里云無關,如果該頁面內容對您造成了困擾,歡迎寫郵件給我們,收到郵件我們將在5個工作日內處理。

如果您發現本社區中有涉嫌抄襲的內容,歡迎發送郵件至: info-contact@alibabacloud.com 進行舉報並提供相關證據,工作人員會在 5 個工作天內聯絡您,一經查實,本站將立刻刪除涉嫌侵權內容。

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

  • Sales Support

    1 on 1 presale consultation

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.