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Fix wrong keysize in PrivateRefCountHash creation.

In4b4b680 I accidentally used sizeof(PrivateRefCountArray) instead ofsizeof(PrivateRefCountEntry) when creating the refcount overflowhashtable. As the former is bigger than the latter, this luckily onlyresulted in a slightly increased memory usage when many buffers arepinned in a backend.Reported-By: Takashi HorikawaDiscussion: 73FA3881462C614096F815F75628AFCD035A48C3@BPXM01GP.gisp.nec.co.jpBackpatch: 9.5, where thew new ref count infrastructure was introduced

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src/backend/storage/buffer
- bufmgr.c

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`‎src/backend/storage/buffer/bufmgr.c`

Lines changed: 1 addition & 1 deletion

Original file line number	Diff line number	Diff line change
`@@ -2103,7 +2103,7 @@ InitBufferPoolAccess(void)`
`2103`	`2103`
`2104`	`2104`	`MemSet(&hash_ctl,0,sizeof(hash_ctl));`
`2105`	`2105`	`hash_ctl.keysize=sizeof(int32);`
`2106`		`-hash_ctl.entrysize=sizeof(PrivateRefCountArray);`
	`2106`	`+hash_ctl.entrysize=sizeof(PrivateRefCountEntry);`
`2107`	`2107`
`2108`	`2108`	`PrivateRefCountHash=hash_create("PrivateRefCount",100,&hash_ctl,`
`2109`	`2109`	`HASH_ELEM \|HASH_BLOBS);`

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Commit815a31c

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`‎src/backend/storage/buffer/bufmgr.c`

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