Re: vacuum tip question

Joost Kraaijeveld wrote:
> Hi,
>
> I am using auto-vacuum (autovacuum = on) but sometimes PGAdmin warns me
> that I need to enable autovacuum or do it manually.
>
> How does PgAdmin determine that it is necessary to run vacuum?

Using the following code:

bool pgTable::GetVacuumHint()
{
bool canHint=false;

if (rowsCounted) // We've explicitly counted the rows
{
if (!estimatedRows || (estimatedRows == 1000 && rows.GetValue()
!= 1000))
canHint = (rows >= 20);
else
{
double rowsDbl=(wxLongLong_t)rows.GetValue();
double quot=rowsDbl *10. / estimatedRows;
canHint = ((quot > 12 || quot < 8) && (rowsDbl <
estimatedRows-20. || rowsDbl > estimatedRows+20.));
}
}
else if (estimatedRows == 1000)
{
canHint = true;
}
return canHint;
}

Regards, Dave