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Improve pg_upgrade commentary on multixact change

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Per gripe from Andres Freund
This commit is contained in:
Alvaro Herrera 2013-02-28 16:29:17 -03:00
parent 63d283ecd0
commit cd7d00ad65
3 changed files with 12 additions and 8 deletions
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6
contrib/pg_upgrade/controldata.c
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@ -470,7 +470,8 @@ get_control_data(ClusterInfo *cluster, bool live_check)
/* verify that we got all the mandatory pg_control data */
if (!got_xid || !got_oid ||
!got_multi || !got_mxoff ||
(!got_oldestmulti && cluster->controldata.cat_ver >= MULTIXACT_FORMATCHANGE_CAT_VER) ||
(!got_oldestmulti &&
cluster->controldata.cat_ver >= MULTIXACT_FORMATCHANGE_CAT_VER) ||
(!live_check && !got_nextxlogfile) ||
!got_tli ||
!got_align || !got_blocksz || !got_largesz || !got_walsz ||
@ -493,7 +494,8 @@ get_control_data(ClusterInfo *cluster, bool live_check)
if (!got_mxoff)
pg_log(PG_REPORT, " latest checkpoint next MultiXactOffset\n");
if (!got_oldestmulti && cluster->controldata.cat_ver >= MULTIXACT_FORMATCHANGE_CAT_VER)
if (!got_oldestmulti &&
cluster->controldata.cat_ver >= MULTIXACT_FORMATCHANGE_CAT_VER)
pg_log(PG_REPORT, " latest checkpoint oldest MultiXactId\n");
if (!live_check && !got_nextxlogfile)

9
contrib/pg_upgrade/pg_upgrade.c
View File

@ -407,11 +407,10 @@ copy_clog_xlog_xid(void)
check_ok();
/*
* If both new and old are after the pg_multixact change commit, copy those
* files too. If the old server is before that change and the new server
* is after, then we don't copy anything but we need to reset pg_control so
* that the new server doesn't attempt to read multis older than the cutoff
* value.
* If the old server is before the MULTIXACT_FORMATCHANGE_CAT_VER change
* (see pg_upgrade.h) and the new server is after, then we don't copy
* pg_multixact files, but we need to reset pg_control so that the new
* server doesn't attempt to read multis older than the cutoff value.
*/
if (old_cluster.controldata.cat_ver >= MULTIXACT_FORMATCHANGE_CAT_VER &&
new_cluster.controldata.cat_ver >= MULTIXACT_FORMATCHANGE_CAT_VER)

5
contrib/pg_upgrade/pg_upgrade.h
View File

@ -109,7 +109,10 @@ extern char *output_files[];
#define VISIBILITY_MAP_CRASHSAFE_CAT_VER 201107031
/*
* pg_multixact format changed in this catversion:
* pg_multixact format changed in 9.3 commit 0ac5ad5134f2769ccbaefec73844f85,
* ("Improve concurrency of foreign key locking") which also updated catalog
* version to this value. pg_upgrade behavior depends on whether old and new
* server versions are both newer than this, or only the new one is.
*/
#define MULTIXACT_FORMATCHANGE_CAT_VER 201301231