with about 8000 rows. For this table query:
SELECT MAX(MsgSeqNum),MAX(LogTimestamp) FROM ELT_tcli_MessageLog WHERE LogTimestamp >= '0' AND IsFromCounterParty = 'Y' AND
IsOutOfSequence = 'N' AND ConnectionName = 'DB_BENCHMARK' AND LogTimestamp IN (SELECT MAX(LogTimestamp) FROM ELT_tcli_MessageLog WHERE MsgSeqNum > 0 AND IsFromCounterParty = 'Y'
AND IsOutOfSequence = 'N' AND ConnectionName = 'DB_BENCHMARK')
takes about 1 second on MSSQL Server and 257 seconds on PostgreSQL one.
Does anybody have idea about reasons of such results?
1. Have you run vaccum analyze recently? 2. Reply with the output of EXPLAIN ANALYZE SELECT...
Chris
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