Does Query plans change on static tables

I have attached two query plans , which are generated by Production server
at different times (1 day apart). ( i could not send mail with attached
plans I had to remove them)
Same query I have executed every day over two weeks time to see how the
query is performing in prod. server. I got two different plans. I didnt
understand how come the plan is changing so drastic when there are not many
data updates on the tables referred in the query. These tables are very
static and i am running dbcc reindex every night on these tables. Plan 1 has
index scan which is taking long time to execute (11 Sec), Plan 2 has no
index scan and so it is executing fast (<200ms). I didnt get a clue why it
is going for index scan some time and no index scan other times. I hope some
one will have answer for it.
Windows 2000 Server/SQL Server 2000 Standard SP4, 2 cpu, 1GB RAM, RAID 1
Disk
Thanks,
Subbu.
underprocessable|||underprocessable|||Statistics can influence the plan choice. Not all stats are tied to
indexes. So, you likely will want to make sure that all statistics are
up-to-date before making any conclusions. (update statistics <tablename>)
If you are close to a boundary between two plan choices, small changes can
push you from one plan to another on a recompile.
Hope that helps,
Conor
"subbu" <subbaiahd@.hotmail.com> wrote in message
news:%23wq2y6NWGHA.1192@.TK2MSFTNGP03.phx.gbl...
> Plan 1: No index SCAN
> Plan 2: Index SCAN
> I had to send in two separate mail as it crossed max limit size
> Thanks,
> Subbu.
> "subbu" <subbaiahd@.hotmail.com> wrote in message
> news:%238V3L3NWGHA.4212@.TK2MSFTNGP03.phx.gbl...
> many
> has
> it
> some
>
>

Does Query plans change on static tables

I have attached two query plans , which are generated by Production server
at different times (1 day apart). ( i could not send mail with attached
plans I had to remove them)
Same query I have executed every day over two weeks time to see how the
query is performing in prod. server. I got two different plans. I didnt
understand how come the plan is changing so drastic when there are not many
data updates on the tables referred in the query. These tables are very
static and i am running dbcc reindex every night on these tables. Plan 1 has
index scan which is taking long time to execute (11 Sec), Plan 2 has no
index scan and so it is executing fast (<200ms). I didnt get a clue why it
is going for index scan some time and no index scan other times. I hope some
one will have answer for it.
Windows 2000 Server/SQL Server 2000 Standard SP4, 2 cpu, 1GB RAM, RAID 1
Disk
Thanks,
Subbu.underprocessable|||underprocessable|||Statistics can influence the plan choice. Not all stats are tied to
indexes. So, you likely will want to make sure that all statistics are
up-to-date before making any conclusions. (update statistics <tablename> )
If you are close to a boundary between two plan choices, small changes can
push you from one plan to another on a recompile.
Hope that helps,
Conor
"subbu" <subbaiahd@.hotmail.com> wrote in message
news:%23wq2y6NWGHA.1192@.TK2MSFTNGP03.phx.gbl...
> Plan 1: No index SCAN
> Plan 2: Index SCAN
> I had to send in two separate mail as it crossed max limit size
> Thanks,
> Subbu.
> "subbu" <subbaiahd@.hotmail.com> wrote in message
> news:%238V3L3NWGHA.4212@.TK2MSFTNGP03.phx.gbl...
> many
> has
> it
> some
>
>

Does Query plans change on static tables

I have attached two query plans , which are generated by Production server
at different times (1 day apart). ( i could not send mail with attached
plans I had to remove them)
Same query I have executed every day over two weeks time to see how the
query is performing in prod. server. I got two different plans. I didnt
understand how come the plan is changing so drastic when there are not many
data updates on the tables referred in the query. These tables are very
static and i am running dbcc reindex every night on these tables. Plan 1 has
index scan which is taking long time to execute (11 Sec), Plan 2 has no
index scan and so it is executing fast (<200ms). I didnt get a clue why it
is going for index scan some time and no index scan other times. I hope some
one will have answer for it.
Windows 2000 Server/SQL Server 2000 Standard SP4, 2 cpu, 1GB RAM, RAID 1
Disk
Thanks,
Subbu.Statistics can influence the plan choice. Not all stats are tied to
indexes. So, you likely will want to make sure that all statistics are
up-to-date before making any conclusions. (update statistics <tablename>)
If you are close to a boundary between two plan choices, small changes can
push you from one plan to another on a recompile.
Hope that helps,
Conor
"subbu" <subbaiahd@.hotmail.com> wrote in message
news:%23wq2y6NWGHA.1192@.TK2MSFTNGP03.phx.gbl...
> Plan 1: No index SCAN
> Plan 2: Index SCAN
> I had to send in two separate mail as it crossed max limit size
> Thanks,
> Subbu.
> "subbu" <subbaiahd@.hotmail.com> wrote in message
> news:%238V3L3NWGHA.4212@.TK2MSFTNGP03.phx.gbl...
>> I have attached two query plans , which are generated by Production
>> server
>> at different times (1 day apart). ( i could not send mail with attached
>> plans I had to remove them)
>> Same query I have executed every day over two weeks time to see how the
>> query is performing in prod. server. I got two different plans. I didnt
>> understand how come the plan is changing so drastic when there are not
> many
>> data updates on the tables referred in the query. These tables are very
>> static and i am running dbcc reindex every night on these tables. Plan 1
> has
>> index scan which is taking long time to execute (11 Sec), Plan 2 has no
>> index scan and so it is executing fast (<200ms). I didnt get a clue why
> it
>> is going for index scan some time and no index scan other times. I hope
> some
>> one will have answer for it.
>>
>> Windows 2000 Server/SQL Server 2000 Standard SP4, 2 cpu, 1GB RAM, RAID 1
>> Disk
>>
>> Thanks,
>> Subbu.
>>
>>
>>
>
>

does Internet Explorer generate logs.

Hi,

I have an query.

Does Internet Explorer generate logs files. If so where does the files get generated.

Thanks in advance.

Try www.sysinternals.com filemon to determine where logging is happening.

What kind of log are you looking for? IE logs your internet history in your documents & settings - temporary internet files. IE 7 has it's own log source in Event Viewer.

Depending on your logging needs, you may need a 3rd-party tool.

You may have better luck in a different group, since this isn't really related to Reporting Services.

cheers,

Andrew