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15 | 15 | * Replication slots are used to keep state about replication streams
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16 | 16 | * originating from this cluster. Their primary purpose is to prevent the
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17 | 17 | * premature removal of WAL or of old tuple versions in a manner that would
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18 |
| - * interfere with replication; they also useful for monitoring purposes. |
| 18 | + * interfere with replication; they are also useful for monitoring purposes. |
19 | 19 | * Slots need to be permanent (to allow restarts), crash-safe, and allocatable
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20 | 20 | * on standbys (to support cascading setups). The requirement that slots be
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21 | 21 | * usable on standbys precludes storing them in the system catalogs.
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@@ -142,7 +142,7 @@ ReplicationSlotsShmemInit(void)
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142 | 142 | * Check whether the passed slot name is valid and report errors at elevel.
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143 | 143 | *
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144 | 144 | * Slot names may consist out of [a-z0-9_]{1,NAMEDATALEN-1} which should allow
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145 |
| - * the name to be uses as a directory name on every supported OS. |
| 145 | + * the name to be used as a directory name on every supported OS. |
146 | 146 | *
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147 | 147 | * Returns whether the directory name is valid or not if elevel < ERROR.
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148 | 148 | */
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@@ -290,7 +290,7 @@ ReplicationSlotCreate(const char *name, bool db_specific)
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290 | 290 | }
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291 | 291 |
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292 | 292 | /*
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293 |
| - * Find an previously created slot and mark it as used by this backend. |
| 293 | + * Find a previously created slot and mark it as used by this backend. |
294 | 294 | */
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295 | 295 | void
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296 | 296 | ReplicationSlotAcquire(const char *name)
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@@ -743,7 +743,7 @@ CreateSlotOnDisk(ReplicationSlot *slot)
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743 | 743 |
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744 | 744 | /*
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745 | 745 | * No need to take out the io_in_progress_lock, nobody else can see this
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746 |
| - * slot yet, so nobody else wil write. We're reusing SaveSlotToPath which |
| 746 | + * slot yet, so nobody else will write. We're reusing SaveSlotToPath which |
747 | 747 | * takes out the lock, if we'd take the lock here, we'd deadlock.
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748 | 748 | */
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749 | 749 |
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@@ -780,7 +780,7 @@ CreateSlotOnDisk(ReplicationSlot *slot)
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780 | 780 | tmppath, path)));
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781 | 781 |
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782 | 782 | /*
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783 |
| - * If we'd now fail - really unlikely - we wouldn't know wether this slot |
| 783 | + * If we'd now fail - really unlikely - we wouldn't know whether this slot |
784 | 784 | * would persist after an OS crash or not - so, force a restart. The
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785 | 785 | * restart would try to fysnc this again till it works.
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786 | 786 | */
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