gpcc踩坑

本文最大的鍋，最大的坑來了

安裝完成之后會(huì)報(bào)以下錯(cuò)誤！你可以完全忽略錯(cuò)誤的解決過程直接跳到最后！

Metrics_collector還沒有添加到共享預(yù)加載庫(shared_preload_libraries)中。請(qǐng)?zhí)砑铀詥⒂弥笜?biāo)收集。詳見文檔。 error alert message, 必須打開GUC gp_enable_query_metrics來啟用指標(biāo)收集。詳見文檔。

第一個(gè)問題解決

gpconfig -l gpconfig -c gp_enable_query_metrics -v on 成功

第二個(gè)問題百思不得其解！
網(wǎng)上查詢的版本均為6.0以下版本

查看狀態(tài) gpconfig -s shared_preload_librariesgpconfig -c shared_preload_libraries -v '\$libdir/metrics_collector,\$libdir/gp_wlm'

然后greenplum系統(tǒng)直接崩潰掉，全部注釋掉才能重新啟動(dòng)greenplum

然后翻看官方文檔

https://gpcc.docs.pivotal.io/610/topics/troubleshooting-wlm.html

pg_config |grep LIBDIR 這個(gè)也可以看目錄，但是完全不是一碼事！Command Center requires the Apache Portable Runtime Utility library. The library is no longer included in the Greenplum Database lib directory, but it is installed as a dependency if you install the Greenplum Database distribution with yum or apt. Run the command yum install apr-util or apt install libapr1 if you need to install the apr-util library.

人家壓根就不需要裝這玩意！！！！

最后翻文檔

https://gpcc.docs.pivotal.io/610/topics/troubleshooting-wlm.htmlAfter installing a Pivotal Greenplum Database distribution, the shared_preload_libraries configuration parameter contains the metrics collector shared library. Make sure this library is still present:$ gpconfig -s shared_preload_libraries Values on all segments are consistent GUC : shared_preload_libraries Master value: metrics_collector Segment value: metrics_collector Check that the shared library exists at $GPHOME/lib/postgresql/metrics_collector.so. If the library does not exist, make sure you have installed the Pivotal Greenplum Database distribution. This extension is not available in the Greenplum Database Open Source version.If the shared library file exists in the $GPHOME/lib/postgresql directory, but not in the shared_preload_libraries parameter, add it with the gpconfig command:$ gpconfig -c shared_preload_libraries -v 'metrics_collector' Note that adding metrics_collector to the shared_preload_libraries parameter does not enable the metrics_collector or gp_wlm extensions, but is a prerequisite for enabling them.The gpmon user must be able to connect to databases from the Command Center host. Make sure to add a host entry like the following in the $MASTER_DATA_DIRECTORY/pg_hba.conf file.

看到了沒有！有兩個(gè)版本！一個(gè)是Pivotal Greenplum Database distribution，一個(gè)是Greenplum Database Open Source version！

在Greenplum Database Open Source version 這個(gè)版本中$GPHOME/lib/postgresql/metrics_collector.so這個(gè)文件壓根就沒有！！！！
因此想要體驗(yàn)更多的功能，必須下載Pivotal Greenplum Database distribution！

總結(jié)

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