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Add GUC ignore_invalid_pages.

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Detection of WAL records having references to invalid pages
during recovery causes PostgreSQL to raise a PANIC-level error,
aborting the recovery. Setting ignore_invalid_pages to on causes
the system to ignore those WAL records (but still report a warning),
and continue recovery. This behavior may cause crashes, data loss,
propagate or hide corruption, or other serious problems.
However, it may allow you to get past the PANIC-level error,
to finish the recovery, and to cause the server to start up.

Author: Fujii Masao
Reviewed-by: Michael Paquier
Discussion: https://www.postgresql.org/message-id/CAHGQGwHCK6f77yeZD4MHOnN+PaTf6XiJfEB+Ce7SksSHjeAWtg@mail.gmail.com
This commit is contained in:
Fujii Masao
2020-01-22 11:56:34 +09:00
parent 79a3efb84d
commit 41c184bc64
3 changed files with 52 additions and 2 deletions
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20
src/backend/utils/misc/guc.c
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@ -123,6 +123,7 @@ extern int CommitSiblings;
extern char *default_tablespace;
extern char *temp_tablespaces;
extern bool ignore_checksum_failure;
extern bool ignore_invalid_pages;
extern bool synchronize_seqscans;
#ifdef TRACE_SYNCSCAN
@ -1172,6 +1173,25 @@ static struct config_bool ConfigureNamesBool[] =
false,
NULL, NULL, NULL
},
{
{"ignore_invalid_pages", PGC_POSTMASTER, DEVELOPER_OPTIONS,
gettext_noop("Continues recovery after an invalid pages failure."),
gettext_noop("Detection of WAL records having references to "
"invalid pages during recovery causes PostgreSQL to "
"raise a PANIC-level error, aborting the recovery. "
"Setting ignore_invalid_pages to true causes "
"the system to ignore invalid page references "
"in WAL records (but still report a warning), "
"and continue recovery. This behavior may cause "
"crashes, data loss, propagate or hide corruption, "
"or other serious problems. Only has an effect "
"during recovery or in standby mode."),
GUC_NOT_IN_SAMPLE
},
&ignore_invalid_pages,
false,
NULL, NULL, NULL
},
{
{"full_page_writes", PGC_SIGHUP, WAL_SETTINGS,
gettext_noop("Writes full pages to WAL when first modified after a checkpoint."),