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• Postgres 9.0 locking up, 100% CPU

  - by Jake

  We are having a problem where our Postgres 9.0 server occasionally locks up and kills our webapp. Restarting Postgres fixes the problem. Here's what I've been able to observe: First, usage of one CPU jumps to 100% for a few minutes Disk operations drop to ~0 during this time Database operations drop to 0 (blocks and tuples per sec) Logs show during this time: WARNING: worker took too long to start; cancelled WARNING: worker took too long to start; cancelled No Queries in logs (only those over 200ms are logged) No unusually long-running queries logged before or during Then the second CPU jumps to 100% The number of postgres processes jumps from the usual 8-10 to ~20 Matched by a spike in Postgres Blocks per second (about twice normal) Logs show LOG: could not accept SSL connection: EOF detected Queries are running but slow Restarting postgres returns everything to normal Setup: Server: Amazon EC2 Large Ubuntu 10.04.2 LTS Postgres 9.0.3 Dedicated DB server Does anyone have any idea what's causing this? Or any suggestions about what else I should be checking out?

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• Mac OSX Mountain Lion Rails Postgres (wiped out a lot of stuff)

  - by kurtybot

  Having trouble with Postgres since I upgraded to Mountain Lion (and now regretting it). Lost hours trying to fix it to no avail. When running rails server then visiting my app at 0.0.0.0:3000 I get this error. psql: could not connect to server: No such file or directory. Is the server running locally and accepting connections on Unix domain socket "/var/pgsql_socket/.s.PGSQL.5432"? tried updating xcode.

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• How to set the SPN for Postgres SSPI

  - by chotchki

  I am trying to setup Postgres to support SSPI/Kerberos, however I think that I have not found out what the correct SPN that is needed to get it working. The background details: Service account for postgres: 'postgres' Domain Name: 'testdomain.com' Domain Controller: 'dc.testdomain.com' I have tried the following SPNs and have had zero luck: setspn -A HOST/testdomain.com postgres setspn -A HOST/testdomain postgres setspn -A POSTGRES/testdomain.com postgres setspn -A POSTGRES/testdomain postgres setspn -A POSTGRES/dc.testdomain.com postgres Does anyone have some suggestions?

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• export Postgres DB to mdb

  - by Aly

  Hi, I have a few DB's which I can access through pgAdmin 3, I have a piece of software that can only analyze .mdb files. does anyone know how to convert/export a postgres db to a mdb? preferably through pgAdmin 3? Thanks

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• "postgres blocked for more than 120 seconds" - is my db still consistent?

  - by nn4l

  I am using an iscsi volume on an Open-E storage system for several virtual machines running on a XenServer host. Occasionally, when there is a very high disk I/O load on the virtual machines (and therefore also on the storage system), I got this error message on the vm consoles: [2594520.161701] INFO: task kjournald:117 blocked for more than 120 seconds. [2594520.161787] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [2594520.162194] INFO: task flush-202:0:229 blocked for more than 120 seconds. [2594520.162274] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [2594520.162801] INFO: task postgres:1567 blocked for more than 120 seconds. [2594520.162882] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. I understand this error message is caused by the kernel to inform that these processes haven't been run for 120 seconds, most likely because a disk access to the storage system has not yet been processed. But what is the effect on the processes. For example, will the postgres process eventually write its data when the storage system is idle again after a few minutes, so that all data is still consistent? Or will it abort the write, leaving some tables in an inconsistent state? I certainly expect that the former should be the case - if the disk access is slow, postgres (or any other affected process) should just wait as long as it takes. I can live with the application hanging for a few minutes. But if there is a chance for data corruption then any of these errors is really bad news. Please advise what to do here.

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• Postgres error messages in Apache error log

  - by Warren Pena

  I'm running Apache 2.2, PHP 5.2, and Postgres 8.2 on Windows, and I'm seeing something funky in Apache's error.log file. Occasionally, I'll see the message "row number -1 is out of range 0..-1" pop up over and over. Unlike all the other lines in that log file, there's no timestamp or log level. Just that exact string. Googling around, it appears that message is, character for character, a common Postgres error message, but is not an Apache error. I've seen it happen multiple times, and on several different servers. I can't seem to reproduce it, though. I've tried throwing all sorts of error ridden database queries and result set inquiries at Postgres via PHP, and none of them seem to trigger that line being written to the log file. Is it possible for Postgres errors to be ending up in my Apache log file, and if so, how? What would trigger an error message like that? Thanks!

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• How to make a JDBCconnect Crystal Reports with Postgres

  - by Alberto

  Hi! I want to creat a new report, using Crystal Reports. I downloaded the Postgres driver but when I want to create the connections it shows an error "JDBC Driver not found" How can I solve it? Thanks:)

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• Connect to Postgres remotely, open port 5432 for Postgres in iptables

  - by Victor

  I am trying to connect to Postgres remotely but I need to open port 5432 in iptables. My current iptables configuration is as follows: *filter # Allows all loopback (lo0) traffic and drop all traffic to 127/8 that doesn't use lo0 -A INPUT -i lo -j ACCEPT -A INPUT ! -i lo -d 127.0.0.0/8 -j REJECT # Accepts all established inbound connections -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT # Allows all outbound traffic # You can modify this to only allow certain traffic -A OUTPUT -j ACCEPT # Allows HTTP and HTTPS connections from anywhere (the normal ports for websites) -A INPUT -p tcp --dport 80 -j ACCEPT -A INPUT -p tcp --dport 443 -j ACCEPT # Allows SSH connections # # THE -dport NUMBER IS THE SAME ONE YOU SET UP IN THE SSHD_CONFIG FILE # -A INPUT -p tcp -m state --state NEW --dport 30000 -j ACCEPT # Allow ping -A INPUT -p icmp -m icmp --icmp-type 8 -j ACCEPT # log iptables denied calls -A INPUT -m limit --limit 5/min -j LOG --log-prefix "iptables denied: " --log-level 7 # Reject all other inbound - default deny unless explicitly allowed policy -A INPUT -j REJECT -A FORWARD -j REJECT COMMIT What would I have to add in iptables to open the port? I'm trying to install phppgadmin on a different server to access the postgres database. Thank you.

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• postgres - sharing same pg_hba.conf between IPV4 system and IPV6 system

  - by StackTrace

  I am trying to package postgres from one machine to another. The source is windows 7 with IP V6 and target is windows XP with IPv4. Starting postgres on windows XP gives error 2010-11-01 12:01:07 IST LOG: invalid IP address "::1": Unknown host 2010-11-01 12:01:07 IST CONTEXT: line 76 of configuration file "C:/postgres/data/pg_hba.conf" 2010-11-01 12:01:07 IST FATAL: could not load pg_hba.conf -- postgres - sharing same pg_hba.conf between IpV4 system and IpV6 system Here is how my pg_hba.conf looks like # TYPE DATABASE USER CIDR-ADDRESS METHOD # IPv4 local connections: host all all 127.0.0.1/32 trust # IPv6 local connections: host all all ::1/128 trust

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• Postgres error messages in Apache error log

  - by Warren Pena

  I'm running Apache 2.2, PHP 5.2, and Postgres 8.2 on Windows, and I'm seeing something funky in Apache's error.log file. Occasionally, I'll see the message "row number -1 is out of range 0..-1" pop up over and over. Unlike all the other lines in that log file, there's no timestamp or log level. Just that exact string. Googling around, it appears that message is, character for character, a common Postgres error message, but is not an Apache error. I've seen it happen multiple times, and on several different servers. I can't seem to reproduce it, though. I've tried throwing all sorts of error ridden database queries and result set inquiries at Postgres via PHP, and none of them seem to trigger that line being written to the log file. Is it possible for Postgres errors to be ending up in my Apache log file, and if so, how? What would trigger an error message like that? Thanks!

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• postgres stats and opennms

  - by robbyt

  What is the best (or easiest?) to monitor postgres 8.4 stats in OpenNMS 1.76? SNMP? How?

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• Torrentflux broke after upgrade

  - by parker.sikand

  A working torrentflux setup seems to have gone broken after upgrading PHP to 5.3 and Postrgres to 9.2beta3 on a FreeBSD 8.2 server. The login screen will show up fine, but after clicking the login button, I get an error : Fatal error: Call to undefined function pg_escape_string() in \ /usr/home/parker/tf/html/inc/lib/adodb/drivers/adodb-postgres64.inc.php \ on line 241 Seems to be an error with PHP and the pgsql php package. The phppgsql package itself is not totally broken because I'm using it to host database driven apps on this server. This is the first and only error I'm seeing from it. How might I go about fixing this problem?

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• Proper management of PGPool II

  - by Cathy

  Currently I have a site, with one Postgres database server. It is just for a select number of users (less than ten) but it needs the maximum uptime possible. I would like some kind of automatic failover for the database. So I was thinking something like: one server running PGPool II, one running Postgres as master, one running Postgres as slave. But then, if wherever PGPool is running suddenly loses power (or dies, or whatever), there's a single point of failure and the whole thing goes down. Is there a solution, assuming that outsourcing this to someone else isn't possible?

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• Why doens't my Postgres user have permissions to add a Postgres database?

  - by orokusaki

  First, I ran: sudo su postgres createuser -U postgres foouser -P which worked fine, and I ran: createdb -U foouser -E utf8 -O foouser foodatabase -T template0 and got "permission denied: cannot create database" Firstly, should I even su as postgres to do operations like the first one (assuming my postgres data dir is owned by postgres), or is -U postgres from any user (assuming trust is used in pg_hba.conf) sufficient? Secondly, why am I running into this error? Is this because the user foouser is a non-superuser? Should I create foodatabase using the postgres user and simply -O foouser?

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• installing zlib for postgres on ubuntu

  - by pstanton

  Hi, i've installed postgres on ubuntu and am trying to do a pg_dump but get the error message: "pg_dump: [archiver] WARNING: requested compression not available in this installation -- archive will be uncompressed" i've read that this is because i didn't install zlib along with postgres. how can i install zlib for postgres now that postgres is already installed? thanks.

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• Nagios command not transmitting all arguments

  - by markus

  I'm using the following service to monitor our postgres db from nagios: define service{ use test-service ; Name of servi$ host_name DEMOCGN002 service_description Postgres State check_command check_nrpe!check_pgsql!192.168.1.135!test!test!test notifications_enabled 1 } On the remote machine I've configured the command: command[check_pgsql]=/usr/lib/nagios/plugins/check_pgsql -H $ARG1$ -d $ARG2$ -l $ARG3$ -p $ARG4$ In the syslog I can see that command is executed, but there is only one argument transmitted: Oct 20 13:18:43 DEMOSRV01 nrpe[1033]: Running command: /usr/lib/nagios/plugins/check_pgsql -H 192.168.1.134 -d -l -p Oct 20 13:18:43 DEMOSRV01 nrpe[1033]: Command completed with return code 3 and output: check_pgsql: Database name is not valid - -l#012Usage:#012check_pgsql [-H <host>] [-P <port>] [-c <critical time>] [-w <warning time>]#012 [-t <timeout>] [-d <database>] [-l <logname>] [-p <password>] Oct 20 13:18:43 DEMOSRV01 nrpe[1033]: Return Code: 3, Output: check_pgsql: Database name is not valid - -l#012Usage:#012check_pgsql [-H <host>] [-P <port>] [-c <critical time>] [-w <warning time>]#012 [-t <timeout>] [-d <database>] [-l <logname>] [-p <password>] Why are arguments 2,3 and 4 missing?

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• opennms postgres connection slow

  - by krisdigitx

  i am running the opennms application server on a physical server and the database on an ESXi VM. Recently the opennms webconsole has been very slow to load as such i deleted most of the events from the database table, now both servers have no load at all, and the psql connection from the application server to the database server is also very fast, but somehow opennms webconsole is still slow. this is the strace from the opennms process id: 18629 futex(0x2aaac77d8a84, FUTEX_WAIT_PRIVATE, 453, NULL <unfinished ...> 3015 futex(0x2aaabc4a2ee4, FUTEX_WAIT_PRIVATE, 323, NULL <unfinished ...> 10863 futex(0x2aaabbebaa94, FUTEX_WAIT_PRIVATE, 395, NULL <unfinished ...> 25260 <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out) 10859 <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out) 10982 <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out) 3011 <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out) 25260 futex(0x2aaae098fc28, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> 10982 futex(0x2aaac0eaf928, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> 3011 futex(0x2aaab0cb1728, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> 10859 futex(0x2aaac062c328, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> 25260 <... futex resumed> ) = 0 10982 <... futex resumed> ) = 0 3011 <... futex resumed> ) = 0 10859 <... futex resumed> ) = 0 25260 futex(0x2aaabc38b6b4, FUTEX_WAIT_PRIVATE, 443, NULL <unfinished ...> 10982 futex(0x2aaabc5d7b94, FUTEX_WAIT_PRIVATE, 99, NULL <unfinished ...> 3011 futex(0x2aaac7c55334, FUTEX_WAIT_PRIVATE, 183, NULL <unfinished ...> 10859 futex(0x2aaabbb8c9d4, FUTEX_WAIT_PRIVATE, 347, NULL <unfinished ...> 10846 <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out) 10846 futex(0x2aaae9022428, FUTEX_WAKE_PRIVATE, 1) = 0 10846 futex(0x2aaabe0030b4, FUTEX_WAIT_PRIVATE, 251, NULL <unfinished ...> 20281 <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out) 14100 <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out) 2925 <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out) 10843 <... futex resumed> ) = -1 ETIMEDOUT (Connection timed out) 20281 futex(0x2aaac7e93628, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> 14100 futex(0x2aaac04e8c28, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> 2925 futex(0x2aaaec085528, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> 10843 futex(0x2aaab20b0528, FUTEX_WAKE_PRIVATE, 1 <unfinished ...> and shows lots of connection timeout??? i think its the connection between the java application and database which is causing issues. any ideas how to troubleshoot this???

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• How can I force a merge of all WAL files in pg_xlog back into my base "data" directory?

  - by Zac B

  Question: Is there a way to tell Postgres (9.2) to "merge all WAL files in pg_xlog back into the non-WAL data files, and then delete all WAL files successfully merged?" I would like to be able to "force" this operation; i.e. checkpoint_segments or archiving settings should be ignored. The filesystem WAL buffer (pg_xlog) directory should be emptied, or nearly emptied. It's fine if some or all of the space consumed by the pg_xlog directory is then consumed by the data directory; our DBA has asked for WAL database backups without any backlogged WALs, but space consumption is not a concern. Having near-zero WAL activity during this operation is a fine constraint. I can ensure that the database server is either shut down or not connectible (zero user-generated transaction load) during this process. Essentially, I'd like Postgres to ignore archiving/checkpoint retention policies temporarily, and flush all WAL activity to the core database files, leaving pg_xlog in the same state as if the database were recently created--with very few WAL files. What I've Tried: I know that the pg_basebackup utility performs something like this (it generates an almost-all-WALs-merged copy of a Postgres instance's data directory), but we aren't ready to use it on all our systems yet, as we are still testing replication settings; I'm hoping for a more short-term solution. I've tried issuing CHECKPOINT commands, but they just recycle one WAL file and replace it with another (that is, if they do anything at all; if I issue them during database idle time, they do nothing). pg_switch_xlog() similarly just forces a switch to the next log segment; it doesn't flush all queued/buffered segments. I've also played with the pg_resetxlog utility. That utility sort of does what I want, but all of its usage docs seem to indicate that it destroys (rather than flushing out of the transaction log and into the main data files) some or all of the WAL data. Is that impression accurate? If not, can I use pg_resetxlog during a zero-WAL-activity period to force a flush of all queued WAL data to non-WAL data? If the answer to that is negative, how can I achieve this goal? Thanks!

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• How could I import Postgres data dumps into MS SQL?

  - by dean nolan

  I have some data that is from a Postgres database dump (not csv or anything) and I am looking to get it into MS SQL. Is there an easy way to do this or a free tool that doesn't have limits on data import size etc? The Postgres is on a Debian VM and I could export it to csv in there but I am new to Linux and don't know how I would transfer it from the VM to Win 7. Thanks

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• How can I secure Postgres for remote access when not in a private network?

  - by orokusaki

  I have a database server on a VMWare VM (Ubuntu 12.04.1 LTS server), and it just occurred to me that the server is accessible via the web, since the same physical server contains a VM that hosts public websites. My iptables in the database are such that only SSH traffic, loopback traffic, and TCP on port 5432 are allowed. I will only allow host access to the Postgres server from the IP of the other VM on the same physical machine. Does this seem sufficient for security, assuming there aren't gaping holes in my general OS configuration, or is Postgres one of those services that should never be web facing, (assuming there are some of "those"). Will I need to use hostssl instead of host in my pg_hba.conf, even though the data will travel only on my own network, presumably?

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• Pgpool-regclass gives error when installling

  - by user119720

  I have a problem when installing the pgpool-regclass. When I'm running 'Make',it shows me this kind of error : p,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m64 -mtune=generic -I/usr/include/et -Wall -Wmissing-prototypes -Wpointer-arith -Wdeclaration-after-statement -Wendif-labels -Wmissing-format-attribute -Wformat-security -fno-strict-aliasing -fwrapv -fpic -I. -I. -I/usr/pgsql-9.2/include/server -I/usr/pgsql-9.2/include/internal -I/usr/include/et -D_GNU_SOURCE -I/usr/include/libxml2 -I/usr/include -c -o pgpool-regclass.o pgpool-regclass.c pgpool-regclass.c:99:37: error: macro "RangeVarGetRelid" requires 3 arguments, but only 2 given pgpool-regclass.c: In function âpgpool_regclassâ: pgpool-regclass.c:99: error: âRangeVarGetRelidâ undeclared (first use in this function) pgpool-regclass.c:99: error: (Each undeclared identifier is reported only once pgpool-regclass.c:99: error: for each function it appears in.) make: *** [pgpool-regclass.o] Error 1 Can anyone help me to sort this things out?I really appreciate it. Thanks.

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• How to debug slow queries in Django+Postgres

  - by lacker

  My database queries from Django are starting to take 1-2 seconds and I'm having trouble figuring out why. Not too big a site, about 1-2 requests per second (that hit Django; static files are just served from nginx.) The thing that confuses me is, I can replicate the slowness in the Django shell using debug mode. But when I issue the exact same queries at an sql prompt they are fast. It takes about a second for a query to return, but when I check connection.queries it reports the time as under 10 ms. Here's an example (from the Django shell): >>> p = PlayerData.objects.get(uid="100000521952372") >>> a = time.time(); p.save(); print time.time() - a 1.96812295914 >>> for d in connection.queries: print d["time"] ... 0.002 0.000 0.000 How can I figure out where this extra time is being spent? I'm using Apache+mod_wsgi in daemon mode, but this happens with just the django shell as well, so I figure it is not apache-related.

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• Does Postgres database support differential backups

  - by Krishna Kumar

  Does Postgres database support differential backups

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• Install python-psycopg on Ubuntu 9.10

  - by jack

  How can I install python-psycopg (not python-psycopg2) on Ubuntu 9.10 "apt-get install python-psycopg" returns "Package python-psycopg has no installation candidate" I also downloaded source code at psycopg-1.1.21.tar.gz but didn't found "make" command in the archive.

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• Hot swapping for Linux web/database servers

  - by Art

  Is there a way to perform the following under Linux: There are two web servers, main and backup There are two database servers (postgres), main and backup Web Servers are in sync with each other, ie. configuration/content/applications are the same Backup database is continuously synced up with main database. If either of main servers goes down, it's being replaced with backup one on the fly. When main database server goes back up, all the data from backup server is uploaded to it. Essentially, I need the hot swapping working automatically with no or minimal user intervention, if possible. Recovery procedure is preferably automatic but can include some manual steps.

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