[firebird-support] Re: When is cache cleared on SuperServer
Thank you Vlad. That is important to know, since I'm using PHP applications with non-persistent connections.
[firebird-support] Re: When is cache cleared on SuperServer
> ---In firebird-support@yahoogroups.com, wrote : > > if I remember right, SuperServer holds cached data as long as connections > exist. So if the last user disconnects the FB cache is cleared. Is that > correct? Yes > When I connect with Flamerobin the table MON$ATTACHMENTS shows me two other > attachments: CACHE WRITER and GARBAGE COLLECTOR. > Does they still exist after last log out No, they finished with last user connection. > and will the cache be cleared? sure > Do they influence the cache process? Of course. Regards, Vlad PS probably you will be interesting in "database linger" feature of fb3: http://www.firebirdsql.org/file/documentation/release_notes/html/en/3_0/rnfb30-ddl-enhance.html#rnfb30-ddl-enhance-linger http://www.firebirdsql.org/file/documentation/release_notes/html/en/3_0/rnfb30-ddl-enhance.html#rnfb30-ddl-enhance-linger
[firebird-support] Firebird-Nodejs: [Connection is closed] error
Guys, I need your help to connect nodejs to firebird.
I have also posted my question on stackoverflow http://stackoverflow.com/
questions/39429372/firebird-getaddrinfo-enotfound/39433949#39433949
I use node-firebird npm package to connect.
https://www.npmjs.com/package/node-firebird
Following is my code
var Firebird = require('node-firebird');
var options = {};
options.host = 'localhost';
options.database='d:\\a.fdb';
options.user = 'sysdba';
options.password = 'sa123';
app.get('/', function(request, response) {
Firebird.attach(options, function(err, db) {
if (err)
console.log(err); //Here I get error [Connection is closed]
console.log(db);
});
});
Help me.
[firebird-support] When is cache cleared on SuperServer
Hi, if I remember right, SuperServer holds cached data as long as connections exist. So if the last user disconnects the FB cache is cleared. Is that correct? When I connect with Flamerobin the table MON$ATTACHMENTS shows me two other attachments: CACHE WRITER and GARBAGE COLLECTOR. Does they still exist after last log out and will the cache be cleared? Do they influence the cache process? Regards, Martin
Re: [firebird-support] Optimizer request
11.09.2016 18:39, 'Djordje Radovanovic' softsis...@sbb.rs [firebird-support] wrote: > maybe to teach me how to ask this > kind of question to not bother you with my wrong style. That's exactly what I wrote: whenever you ask for help with SQL queries, post the plan of the queries, not just stats. -- WBR, SD. ++ Visit http://www.firebirdsql.org and click the Documentation item on the main (top) menu. Try FAQ and other links from the left-side menu there. Also search the knowledgebases at http://www.ibphoenix.com/resources/documents/ ++ Yahoo Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/firebird-support/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/firebird-support/join (Yahoo! ID required) <*> To change settings via email: firebird-support-dig...@yahoogroups.com firebird-support-fullfeatu...@yahoogroups.com <*> To unsubscribe from this group, send an email to: firebird-support-unsubscr...@yahoogroups.com <*> Your use of Yahoo Groups is subject to: https://info.yahoo.com/legal/us/yahoo/utos/terms/
Re: [firebird-support] Optimizer request
Read my previous messages, maybe you'll find my desired result. You were the first one who tried to help me and I admire that but If you do not like my thread, just ignore it, or maybe to teach me how to ask this kind of question to not bother you with my wrong style. Thanks, Djordje -Original Message- From: Dimitry Sibiryakov s...@ibphoenix.com [firebird-support] Sent: Sunday, September 11, 2016 11:03 AM To: firebird-support@yahoogroups.com Subject: Re: [firebird-support] Optimizer request 11.09.2016 10:29, 'Djordje Radovanovic' softsis...@sbb.rs [firebird-support] wrote: > This time instead of 1 reads of orders and 1 reads of partners I > received exactly > what I was asking for. You'd move to desired result faster if instead of useless stats showed plans of the queries. -- WBR, SD. ++ Visit http://www.firebirdsql.org and click the Documentation item on the main (top) menu. Try FAQ and other links from the left-side menu there. Also search the knowledgebases at http://www.ibphoenix.com/resources/documents/ ++ Yahoo Groups Links ++ Visit http://www.firebirdsql.org and click the Documentation item on the main (top) menu. Try FAQ and other links from the left-side menu there. Also search the knowledgebases at http://www.ibphoenix.com/resources/documents/ ++ Yahoo Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/firebird-support/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/firebird-support/join (Yahoo! ID required) <*> To change settings via email: firebird-support-dig...@yahoogroups.com firebird-support-fullfeatu...@yahoogroups.com <*> To unsubscribe from this group, send an email to: firebird-support-unsubscr...@yahoogroups.com <*> Your use of Yahoo Groups is subject to: https://info.yahoo.com/legal/us/yahoo/utos/terms/
[firebird-support] Re: "nbackup needs local access to database file"
---In firebird-support@yahoogroups.com, wrote : > I am getting this error while running nbackup: > > "nbackup needs local access to database file" > > The nbackup sentence is: > > Nbackup.exe -user SYSDBA -pas HereMyPass -B 0 localhost:MyDB_FB3.fdb >C:\temp \MyDB_Level_0.nbk > > If I remove localhost: then it works, but that would be running as embebed > and it is a superserver with active network connections. F:\b30\output_Win32>firebird -a F:\fb30\output_Win32>isql localhost:test_a -user sysdba -pass masterkey Database: localhost:test_a, User: SYSDBA SQL> shell; Microsoft Windows [Version 6.1.7601] Copyright (c) 2009 Microsoft Corporation. All rights reserved. F:\fb30\output_Win32>nbackup.exe -b 0 localhost:test_a s:\test_a.nbk -user sysdba -pass masterkey time elapsed0 sec page reads 181 page writes 181 F:\fb30\output_Win32>exit; SQL> exit; Regards, Vlad
Re: [firebird-support] Gbak performance issues on FB3
Ahhh, OK, thanks!!
Re: [firebird-support] Gbak performance issues on FB3
Fabian, run gbak using services (with -se switch) Vlad PS overquoting is BAD
Re: [firebird-support] "nbackup needs local access to database file"
Ok, but something is not right, in some instances I am getting about 1 or 2 megabytes throughput with gbak fb3, and I am getting 150 MB throughput with gbak fb 2.5; the problem is so evident it cannot be just different access. It seems there is a bottle neck somewhere; perhaps the small changes I've made to the firebird.conf are affecting it substancially??? Simple changes like tcpip packet size to 16384 instead of 8192, more memory assigned to some resources, nothing creazy, like multiply by 4 changes... - Original Message - From: Mark Rotteveel m...@lawinegevaar.nl [firebird-support] To: firebird-support@yahoogroups.com Sent: Sunday, September 11, 2016 5:11 PM Subject: Re: [firebird-support] "nbackup needs local access to database file" On 10-9-2016 23:34, fabia...@itbizolutions.com.au [firebird-support] wrote: > I am getting this error while running nbackup: > > "nbackup needs local access to database file" > > The nbackup sentence is: > > Nbackup.exe -user SYSDBA -pas HereMyPass -B 0 > localhost:MyDB_FB3.fdbC:\temp\MyDB_Level_0.nbk > > If I remove localhost: then it works, but that would be running as > embebed and it is a superserver with active network connections. > > Any ideas? Gbak and nbackup are different tools that work in a different way. Gbak works through a Firebird server (real or embedded), while nbackup works with the physical backup file. Mark -- Mark Rotteveel Posted by: Mark Rotteveel ++ Visit http://www.firebirdsql.org and click the Documentation item on the main (top) menu. Try FAQ and other links from the left-side menu there. Also search the knowledgebases at http://www.ibphoenix.com/resources/documents/ ++ Yahoo Groups Links
Re: [firebird-support] Gbak performance issues on FB3
Mark Ok, I understand, but on the same server I just reverted to Firebird 2.56 and the gbak flies, like it works several times faster than on FB3. One more thing I've noticed that may help understand what is happening, on FB3 gbak uses 15x (15 times) aprox. more network resources that hdd resources while doing a local backup or restore. Obviously in FB 2.5 the network is at zero because there is no need to go through the localhost or ip to avoid launching the embebed connection (the fbk files are local on the hdd, and the database obviously is also local to the same server). My theory is that the issue is somewhere around there. Pehaps there is a way to talk to the super server without involving the network card? Perhaps there is a way to finetune the data flow between gbak and the database and the fbk creation, as it seems somewhere in the chain there is a delay, it seems somewhere there is a bottleneck. I hope my long hours of debbuging are helping identify a potential issue. And to finish on a good note, so far with my application FB3 has not shown any negative behaviour when compared with FB 2.5, I am connecting via ODBC 32 bits. Cheers, Fabian - Original Message - From: Mark Rotteveel m...@lawinegevaar.nl [firebird-support] To: firebird-support@yahoogroups.com Sent: Sunday, September 11, 2016 5:09 PM Subject: Re: [firebird-support] Gbak performance issues on FB3 On 10-9-2016 22:11, fabia...@itbizolutions.com.au [firebird-support] wrote: > I am running both gbak.exe and nbackup.exe on an FB3 server with Windows > 2012 R2 64 bits, 24 processor, 192 GB ram, the nbackup.exe level zero is > much faster than the gbak.exe (does not make any sense, it should take > about the same time as gbak), both running locally but connecting using > the super server (localhost:database_name); any ideas why gbak.exe is so > slow? Your assumption is wrong, nbackup is expected to be a lot faster than gbak as it makes a physical backup of the database pages instead of a logical backup of the data in the database. Mark -- Mark Rotteveel Posted by: Mark Rotteveel ++ Visit http://www.firebirdsql.org and click the Documentation item on the main (top) menu. Try FAQ and other links from the left-side menu there. Also search the knowledgebases at http://www.ibphoenix.com/resources/documents/ ++ Yahoo Groups Links
Re: [firebird-support] Optimizer request
11.09.2016 10:29, 'Djordje Radovanovic' softsis...@sbb.rs [firebird-support] wrote: > This time instead of 1 reads of orders and 1 reads of partners I > received exactly > what I was asking for. You'd move to desired result faster if instead of useless stats showed plans of the queries. -- WBR, SD. ++ Visit http://www.firebirdsql.org and click the Documentation item on the main (top) menu. Try FAQ and other links from the left-side menu there. Also search the knowledgebases at http://www.ibphoenix.com/resources/documents/ ++ Yahoo Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/firebird-support/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/firebird-support/join (Yahoo! ID required) <*> To change settings via email: firebird-support-dig...@yahoogroups.com firebird-support-fullfeatu...@yahoogroups.com <*> To unsubscribe from this group, send an email to: firebird-support-unsubscr...@yahoogroups.com <*> Your use of Yahoo Groups is subject to: https://info.yahoo.com/legal/us/yahoo/utos/terms/
Re: [firebird-support] Optimizer request
This one makes significiant change. This time instead of 1 reads of orders and 1 reads of partners I received exactly what I was asking for. 133 reads of parters table 1335 of orders table Thank you Arno. Please can you explain me part on the right side of FROM? Somewhere in my subconsciousness I have in mind that something like this is doable but never read good explanation of that kind of virtual table. Best reagrds, Djordje Radovanovic From: mailto:firebird-support@yahoogroups.com Sent: Sunday, September 11, 2016 12:11 AM To: firebird-support@yahoogroups.com Subject: Re: [firebird-support] Optimizer request Which Firebird version are you using? Does this perform for you as expected: SELECT * FROM (SELECT partners.partid + 0 AS PartID FROM partners WHERE partners.country = 'Spain') dt JOIN orders ON (orders.partid = dt.partid) Kind Regards, Arno Brinkman From: mailto:firebird-support@yahoogroups.com Sent: Saturday, September 10, 2016 10:05 PM To: firebird-support@yahoogroups.com Subject: Re: [firebird-support] Optimizer request CREATE TABLE PARTNERS ( PARTID INTEGER NOT NULL, COUNTRY CHAR(20) ); ALTER TABLE PARTNERS ADD CONSTRAINT PK_PARTNERS PRIMARY KEY (PARTID); CREATE INDEX PARTNERS_IDX1 ON PARTNERS (COUNTRY); CREATE TABLE ORDERS ( ORDERNUM INTEGER NOT NULL, ORDERDATE DATE, AMOUNT DECIMAL(18,2), PARTID INTEGER ); ALTER TABLE ORDERS ADD CONSTRAINT PK_ORDERS PRIMARY KEY (ORDERNUM); ALTER TABLE ORDERS ADD CONSTRAINT FK_ORDERS_PARTNERS FOREIGN KEY (PARTID) REFERENCES PARTNERS (PARTID) ON DELETE NO ACTION ON UPDATE NO ACTION; This is tables definitions. So, index exist and after all perfomance analyzer gives me same result. Perfomance analyzer was taken from IBExpert. Whatever I do (as others suggest) perfomance are the same. I still vote for changes in optimizer. Right side from WHERE clause needs to be evaluated before main query and it is simple and much better solution same as Oracle optimize query. Firebird is very kind to programmer and has easy to understand, efficient P/SQL and some improvements will give us significant efficiency. . Djordje From: mailto:firebird-support@yahoogroups.com Sent: Friday, September 09, 2016 10:51 PM To: firebird-support@yahoogroups.com Subject: Re: [firebird-support] Optimizer request On Fri, Sep 9, 2016 at 8:30 AM, 'Djordje Radovanovic' softsis...@sbb.rs [firebird-support] wrote: I tried query with subquery in where clause and found big issue for this type of subquery. select * from orders where orders.partid in (select partners.partid from partners where partners.country = ‘Spain’) Perfomance Analysis returns me this partners 687660 non index reads orders 28657 index reads If you analyze this result you’ll find that there is 687659 unnecessary non index reads. If developer of optimizer accept that all queries on the left side of where clause has priority (and there is no way to be opposite) than we have big improvement in optimization. Is there an index on partners.country? What plans are generated for each query? If I were writing this query, I'd write select o.* from orders o inner join partners p where p.partid = o.opartid and p.country = 'Spain'; All that silliness about "select from (select from )" probably doesn't save anything in this case - it does when the inner select is complicated, but not here. Firebird won't carry around unneeded fields from the partners table. What is the distribution of partners.country? Good luck, Ann __,_._,_
Re: [firebird-support] "nbackup needs local access to database file"
On 11-9-2016 09:11, Mark Rotteveel m...@lawinegevaar.nl [firebird-support] wrote: > Gbak and nbackup are different tools that work in a different way. Gbak > works through a Firebird server (real or embedded), while nbackup works > with the physical backup file. That should have been "physical database file". -- Mark Rotteveel
Re: [firebird-support] "nbackup needs local access to database file"
On 10-9-2016 23:34, fabia...@itbizolutions.com.au [firebird-support] wrote: > I am getting this error while running nbackup: > > "nbackup needs local access to database file" > > The nbackup sentence is: > > Nbackup.exe -user SYSDBA -pas HereMyPass -B 0 > localhost:MyDB_FB3.fdbC:\temp\MyDB_Level_0.nbk > > If I remove localhost: then it works, but that would be running as > embebed and it is a superserver with active network connections. > > Any ideas? Gbak and nbackup are different tools that work in a different way. Gbak works through a Firebird server (real or embedded), while nbackup works with the physical backup file. Mark -- Mark Rotteveel
Re: [firebird-support] Gbak performance issues on FB3
On 10-9-2016 22:11, fabia...@itbizolutions.com.au [firebird-support] wrote: > I am running both gbak.exe and nbackup.exe on an FB3 server with Windows > 2012 R2 64 bits, 24 processor, 192 GB ram, the nbackup.exe level zero is > much faster than the gbak.exe (does not make any sense, it should take > about the same time as gbak), both running locally but connecting using > the super server (localhost:database_name); any ideas why gbak.exe is so > slow? Your assumption is wrong, nbackup is expected to be a lot faster than gbak as it makes a physical backup of the database pages instead of a logical backup of the data in the database. Mark -- Mark Rotteveel
