2017-12-26 16:50 GMT+01:00 Edson Carlos Ericksson Richter < rich...@simkorp.com.br>:
> Em 26/12/2017 13:40, Pavel Stehule escreveu: > > > > 2017-12-26 16:37 GMT+01:00 Edson Carlos Ericksson Richter < > rich...@simkorp.com.br>: > >> Em 26/12/2017 12:25, Pavel Stehule escreveu: >> >> >> >> 2017-12-26 14:44 GMT+01:00 Martin Marques <martin.marq...@2ndquadrant.com >> >: >> >>> El 26/12/17 a las 09:52, Edson Carlos Ericksson Richter escribió: >>> > Recently I had a problem with a base file with size 0 in a standby >>> server. >>> > >>> > This raised one question: does PostgreSQL (9.6.6) check base integrity >>> > at startup? >>> > >>> > At least if there are 0 byte size files in base dir? Or CRC? Something? >>> >>> Yes it has CRC check, but only if you initialize the cluster with >>> --data-checksums, and there's a price to pay in performance. >>> >>> >> It has CRC check, but it is used in runtime - when data are necessary >> >> So Postgres usually check nothing on start - few system tables and indexes >> >> Regards >> >> Pavel >> >>> >>> -- >>> Martín Marqués http://www.2ndQuadrant.com/ >>> PostgreSQL Development, 24x7 Support, Training & Services >>> >>> >> >> Any tips to make database server don't start if corrupt? >> If I can change the startup script to make some checks before effectively >> starting the database, what would be the recommendations? >> >> One that seems obvious to me are empty data files (something like "find >> -size 0 $PG_DATA/base")... >> But I'm sure that more experienced PostgreSQL DBA would have more tests >> to check before startup. >> > > I don't think so anybody does it. Reading 1TB database needs more then few > hours. > > Regards > > > >> >> Thanks, >> >> Edson >> > > I'm rebuilding the standby server for two days already, with 23% of > completion status... > If lost the database and backups because of that failure, it would be a > giant disaster. > Few hours checking integrity would be acceptable... Specially if I can run > it on standby only. > very simple check pgdumpall > /dev/null but this doesn't check indexes. Regards Pavel > Regards, > > Edson >
