Frequently Asked Questions (FAQ) for PostgreSQL
- Last updated: Tue Feb 12 12:14:52 EST 2002
+ Last updated: Tue Feb 12 12:18:09 EST 2002
Current maintainer: Bruce Momjian (pgman@candle.pha.pa.us)
4.15.3) Don't currval() and nextval() lead to a race condition with
other users?
4.15.4) Why aren't my sequence numbers reused on transaction abort?
- Why are there gaps in the numbers of my sequence/SERIAL column?
+ Why are there gaps in the numbering of my sequence/SERIAL column?
4.16) What is an OID? What is a TID?
4.17) What is the meaning of some of the terms used in PostgreSQL?
4.18) Why do I get the error "ERROR: Memory exhausted in
by all users.
4.15.4) Why aren't my sequence numbers reused on transaction abort? Why are
- there gaps in the numbers of my sequence/SERIAL column?
+ there gaps in the numbering of my sequence/SERIAL column?
To improve concurrency, sequence values are given out to running
- transactions as needed and are now locked until the transaction
+ transactions as needed and are not locked until the transaction
completes. This causes gaps in numbering from aborted transactions.
4.16) What is an OID? What is a TID?
alink="#0000ff">
<H1>Frequently Asked Questions (FAQ) for PostgreSQL</H1>
- <P>Last updated: Tue Feb 12 12:14:52 EST 2002</P>
+ <P>Last updated: Tue Feb 12 12:18:09 EST 2002</P>
<P>Current maintainer: Bruce Momjian (<A href=
"mailto:pgman@candle.pha.pa.us">pgman@candle.pha.pa.us</A>)<BR>
<A href="#4.15.3">4.15.3</A>) Don't <I>currval()</I> and
<I>nextval()</I> lead to a race condition with other users?<BR>
<A href="#4.15.4">4.15.4</A>) Why aren't my sequence numbers reused
- on transaction abort? Why are there gaps in the numbers of my
+ on transaction abort? Why are there gaps in the numbering of my
sequence/SERIAL column?<BR>
<A href="#4.16">4.16</A>) What is an <SMALL>OID</SMALL>? What is a
<SMALL>TID</SMALL>?<BR>
backend, not by all users.</P>
<H4><A name="4.15.4">4.15.4</A>) Why aren't my sequence numbers reused
- on transaction abort? Why are there gaps in the numbers of my
+ on transaction abort? Why are there gaps in the numbering of my
sequence/SERIAL column?</H4>
<P>To improve concurrency, sequence values are given out to running
- transactions as needed and are now <i>locked</i> until the
- transaction completes. This causes gaps in numbering from aborted
- transactions.
+ transactions as needed and are not locked until the transaction
+ completes. This causes gaps in numbering from aborted transactions.
<H4><A name="4.16">4.16</A>) What is an <SMALL>OID</SMALL>? What is
a <SMALL>TID</SMALL>?</H4>