users-list January 2020

users-list@monetdb.org

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How can i change plan choice according new constraint

by DEMBELE Simon Pierre

hello, I want to know if it is possible to change how monetdb choose a plan by adding new contraints. -- Simon

2 years, 5 months

pymonetdb issue

by ALEX OSSIPOV

Hi All I installed pymonetdb v 1.2.1 and trying to connect to remote server MonetDB v11.35.3 (Nov2019) listening on IPV6 only. I have got next error in python client: >>> mapi_connection.connect(hostname="<server_name>", port=xxxxx, username="monetdb", password="monetdb", database="demo", language="sql", unix_socket=None, connect_timeout=-1) Traceback (most recent call last): File "<stdin>", line 1, in <module> File "/usr/local/lib/python3.7/site-packages/pymonetdb/mapi.py", line 143, in connect self.socket.connect((hostname, port)) socket.gaierror: [Errno -2] Name or service not known >>> My pc client is also using ipv6 to connect to MonetDB server. I also have jdbc connection that works fine. Question: Does it mean pymonetdb does not support ipv6 only environment? What would be the reason if it has nothing to do with protocol? Thanks Alex

2 years, 5 months

Python3 packages for epel

by ALEX OSSIPOV

I cannot seem find MonetDB-python packages in MonetDB EPEL 7/8 directories. Does it mean it is still work in progress ? Thanks Alex

2 years, 5 months

Logs on Windows

by Илья Хайбуллин

Sometimes the MonetDB server just shuts down. I want to find at least some information about what happens before the shutdown. Please tell me how you can turn on logs on Windows or in some other way see what happens before shutting down. MonetDB 5 server 11.35.9 (Nov2019-SP1) (64-bit) Copyright (c) 1993 - July 2008 CWI Copyright (c) August 2008 - 2019 MonetDB B.V., all rights reserved Visit https://www.monetdb.org/ for further information Found 32.0GiB available memory, 8 available cpu cores Libraries: libpcre: 8.41 2017-07-05 openssl: OpenSSL 1.1.1d 10 Sep 2019 libxml2: 2.9.9 Compiled by: monet@WIN2K12R2 (x86_64-pc-winnt) Compilation: cl -GF -W3 -WX -MD -nologo -Ox -Zi -Oi Linking : cl -GF -W3 -WX -MD -nologo -Ox -Zi -Oi

2 years, 6 months

MonetDB crashing due to out of memory - monetdbd[2247] 1.7 (Aug2018-SP2)

by Suresh Devarakonda

Thank you Ying and Jenin. I am going to upgrade the MonetDB as you suggested and then go from there. Can you please let me know where can I find the upgrade procedure. Thank you for your help in advance. Suresh Devarakonda 84.51° TDO - Database Support Team D: 513.632.3692 M: 859.512.1839 A: 100 W. 5th Street, Cincinnati, Ohio 45202 Cincinnati | Chicago | New York | Portland Facebook LinkedIn Instagram Twitter Please consider the environment before printing this email. -----Original Message----- From: users-list <users-list-bounces+suresh.devarakonda=8451.com(a)monetdb.org> On Behalf Of users-list-request(a)monetdb.org Sent: Friday, January 17, 2020 6:00 AM To: users-list(a)monetdb.org Subject: users-list Digest, Vol 89, Issue 6 Send users-list mailing list submissions to users-list(a)monetdb.org To subscribe or unsubscribe via the World Wide Web, visit https://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.monet… or, via email, send a message with subject or body 'help' to users-list-request(a)monetdb.org You can reach the person managing the list at users-list-owner(a)monetdb.org When replying, please edit your Subject line so it is more specific than "Re: Contents of users-list digest..." Today's Topics: 1. Re: MonetDB crashing due to out of memory - monetdbd[2247] 1.7 (Aug2018-SP2) (Ying Zhang) ---------------------------------------------------------------------- Message: 1 Date: Thu, 16 Jan 2020 12:01:27 +0100 From: Ying Zhang <Y.Zhang(a)cwi.nl> To: Communication channel for MonetDB users <users-list(a)monetdb.org> Subject: Re: MonetDB crashing due to out of memory - monetdbd[2247] 1.7 (Aug2018-SP2) Message-ID: <E6A3FCCA-8023-4EBD-AF7A-CF89F615B2D8(a)cwi.nl> Content-Type: text/plain; charset=utf-8 Hai Suresh, First of all, I?d recommend you to upgrade your MonetDB installation to the most recent one, i.e. Nov2019-SP1. There are many improvements related to your problem since Aug2018-SP2. Also, the version you?re using is no longer supported by the open-source team. Please let us know if upgrade helps. But below, a bit more info. inlined. > On 15 Jan 2020, at 23:44, Suresh Devarakonda <Suresh.Devarakonda(a)8451.com> wrote: > > Hi, > > The Moentdb is crashing every couple of weeks due to out of memory in our environment. Did it really crash, or did MonetDB give error messages and stop executing the query? Crash always indicates a problem in MonetDB, but if it?s the second case, it?s expected. > What I have noticed that MonetDB is eating memory and not releasing it at all once we brought up the MonetDB server. I am not sure if this is how MonetDB works or is it a bug. MonetDB is supposed to free up the memory when it no longer use it, which often happens towards the end of a query execution. For further investigation, we need more information after you have upgraded to Nov2019-SP1. In general, we?ll need information with which we can reproduce the problem, e.g. data + queries. > This is running on monetdbd[2247] 1.7 (Aug2018-SP2) version. Also wondering is there way to limit the memory usage of MonetDB. Please beware that depending on your data sizes and (concurrent) queries, MonetDB might run faster into out-of-memory problem, if you limit the amount of memory it may use, How about putting MonetDB in a VM? There are also some undocumented kernel configurations for this, which we don?t recommend to our users lightly? > > Can you guys help me to resolve this issue. If you need professional support, please contact the supporting company MonetDB Solutions. Regards, Jennie > > [root@xxx ~]# monetdb status > name state health remarks > INVPRDB R 6h 67% 3d mapi:monetdb://xxxxx:50000/INVPRDB > FSPPRDB R 6h 50% 6w mapi:monetdb://xxxxx:50000/FSPPRDB > [root@xxxxx ~]# free -g --- Current utilization > total used free shared buff/cache available > Mem: 31 0 22 0 7 30 > Swap: 3 0 3 > > > <image003.png> > > > > > > <image002.jpg> > Suresh Devarakonda > 84.51? > TDO - Database Support Team > D: 513.632.3692 > M: 859.512.1839 > A: 100 W. 5th Street, Cincinnati, Ohio 45202 > > Cincinnati | Chicago | New York | Portland > Facebook LinkedIn Instagram Twitter > Please consider the environment before printing this email. > > > _______________________________________________ > users-list mailing list > users-list(a)monetdb.org > https://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww. > monetdb.org%2Fmailman%2Flistinfo%2Fusers-list&data=02%7C01%7Csures > h.devarakonda%408451.com%7Cae946815e409491cb83d08d79b3c9c2c%7C5f9dc6bd > f38a454a864cc803691193c5%7C0%7C0%7C637148556952386018&sdata=3JmWyH > MNaeMNrBp8vX%2FAYES%2By%2FDqNHqGmE%2FKX%2F%2F4m%2Bs%3D&reserved=0 ------------------------------ Subject: Digest Footer _______________________________________________ users-list mailing list users-list(a)monetdb.org https://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.monet… ------------------------------ End of users-list Digest, Vol 89, Issue 6 *****************************************

2 years, 6 months

Re: embedded python in latest release

by alexo15＠comcast.net

That was it. I was missing python packages Thank you Panos ------ Original Message ------ From: Panagiotis Koutsourakis To: users-list(a)monetdb.org Sent: January 21, 2020 at 7:54 AM Subject: Re: embedded python in latest release Hello Alex, make sure that you have the MonetDB-python or MonetDB-python3 packages installed: dnf install MonetDB-python or dnf install MonetDB-python3 Also you will need to notify the MonetDB server that you want to start with embedded python support. If you are starting the server using the MonetDB daemon, you need to set the relevant property for your database: monetdb set embedpy=true <database> or monetdb set embedpy3=true <database> If you are starting the server by hand, then mserver5 --dbpath=/path/to/database --set embedded_py=2 or mserver5 --dbpath=/path/to/database --set embedded_py=3 Best regards, Panos. On 1/21/20 5:11 AM, ALEX OSSIPOV wrote: Roberto I have all mentioned packages installed. I do not have any issues with R though. Centos based instance also works fine. Thanks Alex On January 20, 2020 at 3:49 AM Roberto Cornacchia <roberto.cornacchia(a)gmail.com> wrote: Alex, Do you have packages python3-devel python3-numpy (python2-devel python2-numpy for python 2) installed in your Fedora system? Yes, you can import what you like in the body of your function, as long as the package is installed in your system. Roberto On Sun, 19 Jan 2020 at 00:12, ALEX OSSIPOV < alexo15(a)comcast.net mailto:alexo15@comcast.net > wrote: I am having problem enabling embedded python in latest realease, MonetDB 5 server v11.35.9 (Nov2019-SP1) My 64bit Fedora environment has multiple versions of both python 2 and 3 wih 32 and 64 bit libs. MonetDB was installed following https://www.monetdb.org/downloads/Fedora/ with additional SELinux. I tried random_integers function from documentation with both embedpy=true and embedpy3=true separately but getting the same type of error: SQL Error [22000]: TypeException:user.s10_0[9]:'pyapi3.eval' undefined in: X_10:bat[:int] := pyapi3.eval(0x559cb0440270:ptr, "{ \n return numpy.random.randint(low, high, size=(amount,))\n}\n;":str, X_7:int, X_8:int, X_9:int); Both py2 and py3 versions work fine on my computer. How do I properly point to a specific python version to be used by MonetDB? Are there any specific env variables that should be set prior to installation/db creation? I tried to define PYTHONPATH but it did not help. Aside question: Can additional modules be imported in function body for PYTHON type functions or does it only work with numpy? Thanks Alex _______________________________________________ users-list mailing list users-list(a)monetdb.org mailto:users-list@monetdb.org https://www.monetdb.org/mailman/listinfo/users-list _______________________________________________ users-list mailing list users-list(a)monetdb.org https://www.monetdb.org/mailman/listinfo/users-list _______________________________________________ users-list mailing list users-list(a)monetdb.org https://www.monetdb.org/mailman/listinfo/users-list

2 years, 6 months

embedded python in latest release

by ALEX OSSIPOV

I am having problem enabling embedded python in latest realease, MonetDB 5 server v11.35.9 (Nov2019-SP1) My 64bit Fedora environment has multiple versions of both python 2 and 3 wih 32 and 64 bit libs. MonetDB was installed following https://www.monetdb.org/downloads/Fedora/ with additional SELinux. I tried random_integers function from documentation with both embedpy=true and embedpy3=true separately but getting the same type of error: SQL Error [22000]: TypeException:user.s10_0[9]:'pyapi3.eval' undefined in: X_10:bat[:int] := pyapi3.eval(0x559cb0440270:ptr, "{ \n return numpy.random.randint(low, high, size=(amount,))\n}\n;":str, X_7:int, X_8:int, X_9:int); Both py2 and py3 versions work fine on my computer. How do I properly point to a specific python version to be used by MonetDB? Are there any specific env variables that should be set prior to installation/db creation? I tried to define PYTHONPATH but it did not help. Aside question: Can additional modules be imported in function body for PYTHON type functions or does it only work with numpy? Thanks Alex

2 years, 6 months

MonetDB crashing due to out of memory - monetdbd[2247] 1.7 (Aug2018-SP2)

by Suresh Devarakonda

Hi, The Moentdb is crashing every couple of weeks due to out of memory in our environment. What I have noticed that MonetDB is eating memory and not releasing it at all once we brought up the MonetDB server. I am not sure if this is how MonetDB works or is it a bug. This is running on monetdbd[2247] 1.7 (Aug2018-SP2) version. Also wondering is there way to limit the memory usage of MonetDB. Can you guys help me to resolve this issue. [root@xxx ~]# monetdb status name state health remarks INVPRDB R 6h 67% 3d mapi:monetdb://xxxxx:50000/INVPRDB FSPPRDB R 6h 50% 6w mapi:monetdb://xxxxx:50000/FSPPRDB [root@xxxxx ~]# free -g --- Current utilization total used free shared buff/cache available Mem: 31 0 22 0 7 30 Swap: 3 0 3 [cid:image003.png@01D5CBCA.6268DF10] [cid:image002.jpg@01D3E7B3.57185110] Suresh Devarakonda 84.51<http://www.8451.com/>° TDO - Database Support Team D: 513.632.3692 M: 859.512.1839 A: 100 W. 5th Street, Cincinnati, Ohio 45202 Cincinnati | Chicago | New York | Portland Facebook<https://www.facebook.com/8451group/?ref=aymt_homepage_panel> LinkedIn<https://www.linkedin.com/company/84-51/?trk=biz-companies-cym> Instagram<https://www.instagram.com/84.51/> Twitter<https://twitter.com/8451group> Please consider the environment before printing this email.

2 years, 6 months

Monetdb crashed issue

by Kalaiarasi Gowtham

Hi, Currently, we are trying to start the database created in monetdb using the following command monetdb start <dbname> starting database 'dbname'... FAILED start: starting '<dbname>' failed: database '<dbname>' has crashed after starting, manual intervention needed, check monetdbd's logfile (merovingian.log) for details Getting logs as follows [root@localhost mydbfarm]# tail -f merovingian.log 2020-01-14 14:56:20 MSG merovingian[19527]: database '<dbname>' (19757) has exited with exit status 1 2020-01-14 14:56:20 ERR control[19527]: !monetdbd: an internal error has occurred 'database '<dbname>' has crashed after starting, manual intervention needed, check monetdbd's logfile (merovingian.log) for details' 2020-01-14 14:56:25 ERR merovingian[19527]: client error: database '<dbname>' has crashed after starting, manual intervention needed, check monetdbd's logfile (merovingian.log) for details Please,help us to solve this issue. Thanks Kalai

2 years, 6 months

Re: users-list Digest, Vol 89, Issue 2

by Kalaiarasi Gowtham

Hi Jenni, Please, find the below steps I have followed to install monetdb *Installation of MonetDB in CentOS 7* *Installing dependencies* # yum update # yum install python autoconf automake libtool bison openssl openssl-devel gettext-devel git # git clone https://github.com/MonetDB/MonetDB.git # cd /MonetDB # ./bootstrap # cd .. # mkdir testdir # cd testdir *To enable py3integration python version 3 should be installed* # yum install centos-release-scl # yum install rh-python36 # scl enable rh-python36 bash *check python version* # python -V then # ../MonetDB/configure –enable-py3integration=yes # make # make install Thanks and regards, Kalai On Wed, 8 Jan 2020 at 16:31, <users-list-request(a)monetdb.org> wrote: > Send users-list mailing list submissions to > users-list(a)monetdb.org > > To subscribe or unsubscribe via the World Wide Web, visit > https://www.monetdb.org/mailman/listinfo/users-list > or, via email, send a message with subject or body 'help' to > users-list-request(a)monetdb.org > > You can reach the person managing the list at > users-list-owner(a)monetdb.org > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of users-list digest..." > > > Today's Topics: > > 1. Re: pymonetdb issue (ferreira) > 2. Re: Monetdb (Ying Zhang) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Tue, 7 Jan 2020 17:22:59 +0000 > From: ferreira <pedro.ferreira(a)monetdbsolutions.com> > To: Communication channel for MonetDB users <users-list(a)monetdb.org>, > ALEX OSSIPOV <alexo15(a)comcast.net> > Subject: Re: pymonetdb issue > Message-ID: > <0e74a920-b2ad-2993-b1dc-fcd7a49105bb(a)monetdbsolutions.com> > Content-Type: text/plain; charset="utf-8"; Format="flowed" > > Hello Alex, > > I just looked at pymonetdb source code and indeed it does not support > IPv6 yet. I'm going to create an issue to request for it. The reason is > because in the past, the MAPI protocol (which MonetDB uses for socket > connections) didn't support IPv6, so the clients (Python, Ruby, JDBC, > etc.) never had to implemented them. However they can now add this option. > > Best regards, > > Pedro > > On 12/22/19 5:30 AM, ALEX OSSIPOV wrote: > > Hi All > > I installed pymonetdb v 1.2.1 and trying to connect to remote > > server?MonetDB v11.35.3 (Nov2019) listening on IPV6 only. I have got > > next error in python client: > > >>> mapi_connection.connect(hostname="<server_name>", port=xxxxx, > > username="monetdb", password="monetdb", database="demo", > > language="sql", unix_socket=None, connect_timeout=-1) > > Traceback (most recent call last): > > File "<stdin>", line 1, in <module> > > File "/usr/local/lib/python3.7/site-packages/pymonetdb/mapi.py", line > > 143, in connect > > self.socket.connect((hostname, port)) > > socket.gaierror: [Errno -2] Name or service not known > > >>> > > My pc client is also using ipv6 to connect to MonetDB server. I also > > have jdbc connection that works fine. > > Question: > > Does it mean pymonetdb does not support ipv6 only environment? > > What would be the reason if it has nothing to do with protocol? > > > > Thanks > > Alex > > > > > > _______________________________________________ > > users-list mailing list > > users-list(a)monetdb.org > > https://www.monetdb.org/mailman/listinfo/users-list >

2 years, 6 months

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