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Update notes for 2017-11-23

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Alan Orth 2017-11-24 00:59:11 +02:00
parent 9520c8b490
commit 56a001943d
Signed by: alanorth
GPG Key ID: 0FB860CC9C45B1B9
3 changed files with 10 additions and 8 deletions
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1
content/post/2017-11.md
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@ -826,6 +826,7 @@ $ grep 70.32.83.92 dspace.log.2017-11-23 | grep -o -E 'session_id=[A-Z0-9]{32}'
- I'm wondering if REST works differently, or just doesn't log these sessions? - I'm wondering if REST works differently, or just doesn't log these sessions?
- I wonder if they are measurable via JMX MBeans? - I wonder if they are measurable via JMX MBeans?
- I did some tests locally and I don't see the sessionCounter incrementing after making requests to REST, but it does with XMLUI and OAI
- I came across some interesting PostgreSQL tuning advice for SSDs: https://amplitude.engineering/how-a-single-postgresql-config-change-improved-slow-query-performance-by-50x-85593b8991b0 - I came across some interesting PostgreSQL tuning advice for SSDs: https://amplitude.engineering/how-a-single-postgresql-config-change-improved-slow-query-performance-by-50x-85593b8991b0
- Apparently setting `random_page_cost` to 1 is "common" advice for systems running PostgreSQL on SSD (the default is 4) - Apparently setting `random_page_cost` to 1 is "common" advice for systems running PostgreSQL on SSD (the default is 4)
- So I deployed this on DSpace Test and will check the Munin PostgreSQL graphs in a few days to see if anything changes - So I deployed this on DSpace Test and will check the Munin PostgreSQL graphs in a few days to see if anything changes

7
public/2017-11/index.html
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@ -38,7 +38,7 @@ COPY 54701
<meta property="article:published_time" content="2017-11-02T09:37:54&#43;02:00"/> <meta property="article:published_time" content="2017-11-02T09:37:54&#43;02:00"/>
<meta property="article:modified_time" content="2017-11-23T12:23:19&#43;02:00"/> <meta property="article:modified_time" content="2017-11-23T17:18:45&#43;02:00"/>
@ -86,9 +86,9 @@ COPY 54701
"@type": "BlogPosting", "@type": "BlogPosting",
"headline": "November, 2017", "headline": "November, 2017",
"url": "https://alanorth.github.io/cgspace-notes/2017-11/", "url": "https://alanorth.github.io/cgspace-notes/2017-11/",
"wordCount": "4825", "wordCount": "4849",
"datePublished": "2017-11-02T09:37:54&#43;02:00", "datePublished": "2017-11-02T09:37:54&#43;02:00",
"dateModified": "2017-11-23T12:23:19&#43;02:00", "dateModified": "2017-11-23T17:18:45&#43;02:00",
"author": { "author": {
"@type": "Person", "@type": "Person",
"name": "Alan Orth" "name": "Alan Orth"
@ -1074,6 +1074,7 @@ $ grep -c com.atmire.utils.UpdateSolrStatsMetadata dspace.log.2017-11-19
<ul> <ul>
<li>I&rsquo;m wondering if REST works differently, or just doesn&rsquo;t log these sessions?</li> <li>I&rsquo;m wondering if REST works differently, or just doesn&rsquo;t log these sessions?</li>
<li>I wonder if they are measurable via JMX MBeans?</li> <li>I wonder if they are measurable via JMX MBeans?</li>
<li>I did some tests locally and I don&rsquo;t see the sessionCounter incrementing after making requests to REST, but it does with XMLUI and OAI</li>
<li>I came across some interesting PostgreSQL tuning advice for SSDs: <a href="https://amplitude.engineering/how-a-single-postgresql-config-change-improved-slow-query-performance-by-50x-85593b8991b0">https://amplitude.engineering/how-a-single-postgresql-config-change-improved-slow-query-performance-by-50x-85593b8991b0</a></li> <li>I came across some interesting PostgreSQL tuning advice for SSDs: <a href="https://amplitude.engineering/how-a-single-postgresql-config-change-improved-slow-query-performance-by-50x-85593b8991b0">https://amplitude.engineering/how-a-single-postgresql-config-change-improved-slow-query-performance-by-50x-85593b8991b0</a></li>
<li>Apparently setting <code>random_page_cost</code> to 1 is &ldquo;common&rdquo; advice for systems running PostgreSQL on SSD (the default is 4)</li> <li>Apparently setting <code>random_page_cost</code> to 1 is &ldquo;common&rdquo; advice for systems running PostgreSQL on SSD (the default is 4)</li>
<li>So I deployed this on DSpace Test and will check the Munin PostgreSQL graphs in a few days to see if anything changes</li> <li>So I deployed this on DSpace Test and will check the Munin PostgreSQL graphs in a few days to see if anything changes</li>

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public/sitemap.xml
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@ -4,7 +4,7 @@
<url> <url>
<loc>https://alanorth.github.io/cgspace-notes/2017-11/</loc> <loc>https://alanorth.github.io/cgspace-notes/2017-11/</loc>
<lastmod>2017-11-23T12:23:19+02:00</lastmod> <lastmod>2017-11-23T17:18:45+02:00</lastmod>
</url> </url>
<url> <url>
@ -134,7 +134,7 @@
<url> <url>
<loc>https://alanorth.github.io/cgspace-notes/</loc> <loc>https://alanorth.github.io/cgspace-notes/</loc>
<lastmod>2017-11-23T12:23:19+02:00</lastmod> <lastmod>2017-11-23T17:18:45+02:00</lastmod>
<priority>0</priority> <priority>0</priority>
</url> </url>
@ -145,7 +145,7 @@
<url> <url>
<loc>https://alanorth.github.io/cgspace-notes/tags/notes/</loc> <loc>https://alanorth.github.io/cgspace-notes/tags/notes/</loc>
<lastmod>2017-11-23T12:23:19+02:00</lastmod> <lastmod>2017-11-23T17:18:45+02:00</lastmod>
<priority>0</priority> <priority>0</priority>
</url> </url>
@ -157,13 +157,13 @@
<url> <url>
<loc>https://alanorth.github.io/cgspace-notes/post/</loc> <loc>https://alanorth.github.io/cgspace-notes/post/</loc>
<lastmod>2017-11-23T12:23:19+02:00</lastmod> <lastmod>2017-11-23T17:18:45+02:00</lastmod>
<priority>0</priority> <priority>0</priority>
</url> </url>
<url> <url>
<loc>https://alanorth.github.io/cgspace-notes/tags/</loc> <loc>https://alanorth.github.io/cgspace-notes/tags/</loc>
<lastmod>2017-11-23T12:23:19+02:00</lastmod> <lastmod>2017-11-23T17:18:45+02:00</lastmod>
<priority>0</priority> <priority>0</priority>
</url> </url>