5 Simple Statements About pg เว็บตรง Explained
5 Simple Statements About pg เว็บตรง Explained
Blog Article
If a long run main launch at any time modifications the information storage structure in a way which makes the aged data structure unreadable, pg_upgrade won't be get more info usable for this sort of updates. (The community will try and avoid these kinds of scenarios.)
put in the exact same extension shared object files on The brand new standbys you put in in The brand new Main cluster.
Internet cease postgresql-sixteen Streaming replication and log-transport standby servers will have to be managing for the duration of this shutdown so that they get all modifications.
If you utilize url method, the improve will probably be considerably faster (no file copying) and use significantly less disk Place, but you won't be capable to accessibility your previous cluster when You begin The brand new cluster once the up grade. backlink method also necessitates which the aged and new cluster data directories be in a similar file technique.
use website link method, don't have or will not need to use rsync, or want A better Answer, skip the Guidelines During this part and easily recreate the standby servers the moment pg_upgrade completes and The brand new Most important is jogging.
though rsync needs to be run on the key for at least one standby, it is feasible to run rsync on an upgraded standby to update other standbys, providing the upgraded standby has not been started.
documents which were not linked on the principal are copied from the main to the standby. (They are generally small.) This delivers immediate standby upgrades. however, rsync needlessly copies files connected to momentary and unlogged tables due to the fact these documents Really don't Generally exist on standby servers.
It's also possible to specify consumer and port values, and irrespective of whether you want the info documents joined or cloned as opposed to the default duplicate conduct.
This option can considerably reduce the time to improve a multi-database server running on a multiprocessor equipment.
If an mistake happens when restoring the databases schema, pg_upgrade will exit and you will have to revert to the old cluster as outlined in Step seventeen beneath. To try pg_upgrade once again, you must modify the aged cluster Hence the pg_upgrade schema restore succeeds.
due to the fact optimizer figures are not transferred by pg_upgrade, you may be instructed to run a command to regenerate that information and facts at the conclusion of the enhance. you would possibly ought to set relationship parameters to match your new cluster.
If your installation directory is just not Variation-particular, e.g., /usr/community/pgsql, it is necessary to maneuver The existing PostgreSQL install directory so it does not interfere With all the new PostgreSQL installation.
psql --username=postgres --file=script.sql postgres The scripts may be operate in any purchase and might be deleted as soon as they have already been run.
If you see something inside the documentation that is not suitable, isn't going to match your working experience with the particular characteristic or demands further clarification, make sure you use this manner to report a documentation issue.
if you would like use link method and you don't want your aged cluster being modified if the new cluster is started off, consider using the clone method. If that's not readily available, generate a copy of the aged cluster and enhance that in backlink manner. to produce a sound duplicate with the aged cluster, use rsync to produce a dirty copy from the previous cluster even though the server is working, then shut down the outdated server and operate rsync --checksum yet again to update the duplicate with any variations to make it reliable.
Report this page