A checklist for designing and developing internet scale services, inspired by James Hamilton's 2007 paper "On Desgining and Deploying Internet-Scale Services."
FWIW: I didn't produce the content presented here (the outline from Edmond Lau's book). I've just copy-pasted it from somewhere over the Internet, but I cannot remember what exactly the original source is. I was also not able to find the author's name, so I cannot give him/her the proper credits.
Here are the steps to installing and setting up GDB on Mac OS Sierra/High Sierra.
Run brew install gdb.
On starting gdb, you will get the following error:
Unable to find Mach task port for process-id 2133: (os/kern) failure (0x5).
(please check gdb is codesigned - see taskgated(8))To fix this error, follow the following steps:
| # Kernel sysctl configuration file for Red Hat Linux | |
| # | |
| # For binary values, 0 is disabled, 1 is enabled. See sysctl(8) and | |
| # sysctl.conf(5) for more details. | |
| # Controls source route verification | |
| net.ipv4.conf.default.rp_filter = 1 | |
| # Do not accept source routing | |
| net.ipv4.conf.default.accept_source_route = 0 |
| -module(timetop). | |
| -export([top/2]). | |
| top(Duration, Count) -> | |
| OldPrio = erlang:process_flag(priority, high), | |
| Result = scheduled_time_top(Duration), | |
| erlang:process_flag(priority, OldPrio), | |
| lists:sublist(Result, Count). |
| 1) see re: increasing shmmax http://stackoverflow.com/a/10629164/1283020 | |
| 2) add to postgresql.conf: | |
| shared_preload_libraries = 'pg_stat_statements' # (change requires restart) | |
| 136 pg_stat_statements.max = 1000 | |
| 137 pg_stat_statements.track = all | |
| 3) restart postgres | |
| 4) check it out in psql |