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We are using cluster of Web servers and Application servers. Load Balancer is used to manage the load between them. Down the layer we have middleware server and then DB server to access database.
We use SAR command for that purpose. We also have GUI system monitoring tool to keep real time check of requests, load and memory usage.
We try to look for errors in the last n minutes when the issue occurred. If the issue is still occurring intermittently, we tail the logs for different application server instances to see the error snippets coming in the live logs.
Yes we have created System as well as Log monitoring scripts to keep track of exceptions. We are also using a tool that will inform the stake holders if an exceptional event occurs with the system.
We are using Akamai as web server cache.
Yes , sometime we receive issues related to outdated pages being rendered to the user. In those cases we clear the cache and then try to investigate the reason for that. Sometime the issue is due to comparatively high refresh interval. In those cases we reduce the cache refresh interval.
We involve DBA and try to solve it through them. By the time they are solving it , we keep the stake holders informed regarding the progress.
Yes, I have created many aliases and saved them within my .profile file so that the system loads them, the each time i logs onto the server.
We inform the stakeholders regarding the resolution and steps taken for it. We updated the ticket notes and link it with the master / related tickets. RCA is done for the high priority and critical issues and a report is submitted.
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