Stats getting corrupted - Mailing list pgsql-admin

From Devendra Yadav
Subject Stats getting corrupted
Date
Msg-id CAGQOD0mu3u-k3oRJdrhrJJwBNK0An7nG02jUypgqiMxoRvZ5Ug@mail.gmail.com
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Responses Re: Stats getting corrupted  (Alvaro Herrera <alvherre@2ndquadrant.com>)
List pgsql-admin
Dear All,

The stats file in pg_stat_tmp are getting corrupted. Even earlier the files in pg_stat got corrupted. They show ?? ?? when you list the files in folder. Also we can see them in the error log. 
it says " could not open statistics file 'pg_stat_tml/db_0.tmp': to 'pg_stat_tmp/db_0.stat': Input/output error".

After doing e2fsck (file system scan ) it is fixed but that needs downtime and also it removes the file. What is the impact if the file is being removed ?

Has anybody faced such issue or can guide me what can be done and how it can be avoided in near future ?

Thanks and Regards,
Devendra Yadav

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