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Re: Hot Standby dev build (v8) - Mailing list pgsql-hackers

From Heikki Linnakangas
Subject Re: Hot Standby dev build (v8)
Date
Msg-id 49746B63.1050302@enterprisedb.com
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In response to Re: Hot Standby dev build (v8)  (Simon Riggs <simon@2ndQuadrant.com>)
Responses Re: Hot Standby dev build (v8)  (Simon Riggs <simon@2ndQuadrant.com>)
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Simon Riggs wrote:
> GetSnapshotData() sets
> RecentGlobalXmin to the result of the snapshot's xmin.

No. RecentGlobalXmin is set to the oldest *xmin* observed, across all 
running transactions. TransactionXmin is the xid of the oldest running 
transaction. IOW, RecentGlobalXmin is the xid of transaction that the 
oldest running transaction sees as running.

--   Heikki Linnakangas  EnterpriseDB   http://www.enterprisedb.com

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