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FF [PGPRO-7565] use 64-bit atomic access for MyPgXact xid/xmin by ziva777 · Pull Request #21 · postgrespro/mmts · GitHub
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[PGPRO-7565] use 64-bit atomic access for MyPgXact xid/xmin #21

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[PGPRO-7565] use 64-bit atomic access for MyPgXact xid/xmin #21

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[PGPRO-7565] use 64-bit atomic access for MyPgXact xid/xmin 
Switch to the pg_atomic_* calls for the xid/xmin.  This fixes a transient error
due to non-atomic reading of the xid/xmin values from shared memory on 32-bit
arch.

tags: 64xid
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Maxim Orlov committed Nov 21, 2024
commit e0884c381d3c06c32bbfea6d50d3231f7b3dc213
4 changes: 4 additions & 0 deletions src/dmq.c
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Expand Up @@ -1449,7 +1449,11 @@ dmq_receiver_loop(PG_FUNCTION_ARGS)
extra = dmq_receiver_start_hook(sender_name);

/* do not hold globalxmin. XXX: try to carefully release snaps */
#ifdef PGPRO_EE
pg_atomic_write_u64(&MyPgXact->xmin, InvalidTransactionId);
#else
MyPgXact->xmin = InvalidTransactionId;
#endif

for (;;)
{
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