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Showing posts with the label database size

Redis user permissions (ACL) and python connection

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 Recently, I was working on setting up a redis cluster along with separate users for readwrite and readonly. I setup the readonly user using the below privileges (ACLs):   user redisreadonly on >mySuperSecretPassword ~* resetchannels -@all +@read +ping +asking   Once this is setup, I wrote a simple program in python to connect to the redis cluster using the readonly credentials and print the number of keys.   #!/usr/bin/env python3 """ pip3 install redis """ from redis.cluster import RedisCluster, ClusterNode # ─────── Cluster connection ─────── startup_nodes = [ ClusterNode("redis_host_1", 6379), ClusterNode("redis_host_2", 6379), ClusterNode("redis_host_3", 6379) ] rc = RedisCluster(startup_nodes=startup_nodes,decode_responses=True,username='redisreadonly',password='mySuperSecretPassw...
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Find the size of an Oracle database

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A very common question in any interview is "How do you find the size of a database?" This question can be answered in numerous ways. For e.g., some might say that the size of the database is the sum of the size of each datafile. Some might add the size of the tempfiles to the afore mentioned answer. However, according to me, the size of the database can be calculated as below: Database size = size of datafiles + size of tempfiles + size of redologs + size of controlfiles The above formula can be put to use using the below mentioned SQL. set serveroutput on declare DB_SIZE number; dfsize number; tfsize number; rlsize number; cfsize number; begin select sum(bytes)/1024/1024 "DATA_FILE_SIZE" into dfsize from dba_data_files; select sum(bytes)/1024/1024 "TEMP_FILE_SIZE" into tfsize from dba_temp_files; select sum(bytes)/1024/1024 "REDO_LOG_SIZE" into rlsize from v$log; select (BLOCK_SIZE * (1 + FILE_SIZE_BLKS))/1024/1024 "CONTROL_FILE_SIZE" ...
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EXCEPTION_ACCESS_VIOLATION in Jinitiator and IE crashes

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The Environment Apps Version : 11.5.10.2 Jinitiator Version : 1.3.1.26 Internet Explorer Version : 6 The Issue One of our end users was receiving a very strange error while using jinitiator. The Internet explorer window would crash (close by itself) after creating a file HS_ERR_PID .log on the desktop, where #### stands for the Process ID of the f60webmx session. This error is intermittent and not easily reproducible. Moreover, the user would have to redo his/her work and hence this issue was turning out to be very vexing indeed. The error log is as below: An unexpected exception has been detected in native code outside the VM. Unexpected Signal : EXCEPTION_ACCESS_VIOLATION occurred at PC=0x6D043D1AFunction name=Java_sun_java2d_loops_DefaultComponent_IntIsomorphicCopy Library=C:\Program Files\Oracle\JInitiator 1.3.1.26\bin\awt.dll Current Java thread: at sun.java2d.loops.DefaultComponent.IntIsomorphicCopy(Native Method) at sun.java2d.loops.IntRgbToIntRgb.OpaqueBlit(Unknown Source) at ...
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Version of mod_security with EBS 11.5.10.2

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Though it was a bit tough to find out the version of Mod_security that is shipped with E-Business Suite 11.5.10.2, I finally managed to do it, thanks to Metalink Fora! The version that comes with eBS 11.5.10.2 is 1.8.4 . Below is how you find out the version of mod_security shipped with your version of eBS. $ strings $IAS_ORACLE_HOME/Apache/Apache/libexec/mod_security.so | grep mod_security/
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Read a file and extract specific lines using Native Ansible Modules

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I never realised that reading a file on a remote host and extracting specific lines from that file would be such an arduous task. As part of one of my projects, I had this requirement and without using "cat" or other shell utilities, it was quite cumbersome to read and extract the information that I was looking for. Read on to find out how it can be done using Ansible native commands. Note that I have suggested only one out of a possible many methods. Feel free to explore yourself and update the comments here! REMOTE FILE CONTENTS $ cat /tmp/IP_and_hostnames.txt $ cat /tmp/IP_and_hostnames.txt 192.168.230.165:example-host-1.example.com 192.168.230.166:example-host-2.example.com 192.168.230.167:example-host-3.example.com 192.168.230.175:example-host-1-vip.example.com 192.168.230.176:example-host-2-vip.example.com 192.168.230.177:example-host-3-vip.example.com 192.168.230.185:example-host-1-priv.example.com 192.168.230.186:e...
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