core. files inside base directory

From: Daulat Ram <Daulat(dot)Ram(at)vdx(dot)tv>
To: "pgsql-general(at)lists(dot)postgresql(dot)org" <pgsql-general(at)lists(dot)postgresql(dot)org>
Subject: core. files inside base directory
Date: 2020-03-26 10:42:46
Message-ID: MWHPR01MB252629F78354D73981191774E5CF0@MWHPR01MB2526.prod.exchangelabs.com
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Hello, I have the core. Files inside the base directory of my postgres 10 setup . Would you please let me know the importance of these files . When they generate . Can we delete them ?
/base/
du -sh *
24M base
8.1G core.26166
1.5G core.26258
8.1G core.27849
12M core.27951
4.3G core.2951
8.1G core.324
4.9G core.3241
8.1G core.3295
5.0G core.3470
5.2G core.3485
5.3G core.3699
5.0G core.3724
5.3G core.375
5.0G core.3935
5.3G core.3960
1.2G core.408

Thanks,

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