Mercurial > p > roundup > code
view website/issues/html/query.edit.html @ 6565:2c2dbfc332ba
Try to handle multiple connections better.
The session database is a hot spot. When multiple requests (e.g. 20)
come in at the same time session database contention can get great.
The original code didn't retry session database access when the open
failed. This resulted in errors at the client.
The second pass delayed 0.01 seconds and retried. It was better but we
still had multiple second stalls. I think the first request got in,
everybody else backed up and then retried at the same time. Again they
stepped on each other. With logging I would see many counters go all
the way to low single digits or to -1 indicating falure.
This pass uses randomint to generate delays from 0-.125 seconds in 5ms
increments. This performs better in testing. I rarely saw a counter
less than 13 (2 failed retries). Current logging starts after 6
failures and counts down until success or failure.
| author | John Rouillard <rouilj@ieee.org> |
|---|---|
| date | Thu, 16 Dec 2021 20:02:00 -0500 |
| parents | 58c52057418d |
| children |
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<!-- dollarId: user.item,v 1.7 2002/08/16 04:29:04 richard Exp dollar--> <tal:block metal:use-macro="templates/page/macros/icing"> <title metal:fill-slot="head_title" i18n:translate="" >"Your Queries" Editing - <span tal:replace="config/TRACKER_NAME" i18n:name="tracker" /></title> <span metal:fill-slot="body_title" tal:omit-tag="python:1" i18n:translate="">"Your Queries" Editing</span> <td class="content" metal:fill-slot="content" tal:define="anti_csrf_this_page python:utils.anti_csrf_nonce()" > <span tal:condition="not:context/is_edit_ok" i18n:translate="">You are not allowed to edit queries.</span> <script tal:attributes="nonce request/client/client_nonce" language="javascript"> // This allows us to make the delete button an immediate action. // The post_to_url function comes from: // http://stackoverflow.com/questions/133925/javascript-post-request-like-a-form-submit function retire(qid, csrf) { post_to_url('query'+qid, {'@action': 'retire', '@template':'edit', '@csrf': csrf}); } function restore(qid, csrf) { post_to_url('query'+qid, {'@action': 'restore', '@template': 'edit', '@csrf': csrf}); } function post_to_url(path, params, method) { method = method || "post"; // Set method to post by default if not specified. var form = document.createElement("form"); form.setAttribute("method", method); form.setAttribute("action", path); for(var key in params) { if(params.hasOwnProperty(key)) { var hiddenField = document.createElement("input"); hiddenField.setAttribute("type", "hidden"); hiddenField.setAttribute("name", key); hiddenField.setAttribute("value", params[key]); form.appendChild(hiddenField); } } document.body.appendChild(form); form.submit(); } </script> <form method="POST" onSubmit="return submit_once()" action="query" enctype="multipart/form-data" tal:condition="context/is_edit_ok"> <table class="list" width="100%" tal:define="uid request/user/id; mine request/user/queries"> <tr><th i18n:translate="">Query</th> <th i18n:translate="">Include in "Your Queries"</th> <th i18n:translate="">Edit</th> <th i18n:translate="">Private to you?</th> <th i18n:translate="">delete/restore<br> (javascript<br>required)</th> </tr> <tr> <td colspan="5"><b i18n:translate="">Queries I created</b></td> </tr> <tr tal:define="queries python:db.query.filter(filterspec={'creator': uid})" tal:repeat="query queries"> <tal:block> <td><a tal:attributes="href string:${query/klass}?${query/url}" tal:content="query/name">query</a></td> <td metal:define-macro="include"> <select tal:condition="python:query.id not in mine" tal:attributes="name string:user${uid}@add@queries"> <option value="" i18n:translate="">leave out</option> <option tal:attributes="value query/id" i18n:translate="">include</option> </select> <select tal:condition="python:query.id in mine" tal:attributes="name string:user${uid}@remove@queries"> <option value="" i18n:translate="">leave in</option> <option tal:attributes="value query/id" i18n:translate="">remove</option> </select> </td> <td><a tal:attributes="href string:query${query/id}" i18n:translate="">edit</a></td> <td> <select tal:attributes="name string:query${query/id}@private_for"> <option tal:attributes="selected python:query.private_for == uid; value uid" i18n:translate="">yes</option> <option tal:attributes="selected python:not query.private_for" value="-1" i18n:translate="">no</option> </select> </td> <td> <input type="button" value="Delete" i18n:attributes="value" tal:attributes="onClick python:'''retire('%s','%s')'''%(query.id,anti_csrf_this_page)"> </td> </tal:block> </tr> <tr> <td colspan="4"><b i18n:translate="">Queries others created</b></td> <td colspan="4"><b i18n:translate="">Owner</b></td> </tr> <tr tal:define="queries python:db.query.filter(filterspec={'private_for': None})" tal:repeat="query queries"> <tal:block tal:condition="python:not query.creator == uid"> <td><a tal:attributes="href string:${query/klass}?${query/url}" tal:content="query/name">query</a></td> <td metal:use-macro="template/macros/include" /> <td colspan="2" tal:condition="not:query/is_edit_ok" i18n:translate="">[not yours to edit]</td> <td colspan="2" tal:condition="query/is_edit_ok" i18n:translate=""><a tal:attributes="href string:query${query/id}" i18n:translate="">edit</a></td> <td colspan="2" tal:content="query/creator" i18n:translate="">put query owner here</td> </tal:block> </tr> <tr> <td colspan="5"><b i18n:translate="">Active retired/private queries</b></td> </tr> <tal:block tal:repeat="query request/user/queries"> <tr> <tal:block condition="python:path('query/is_retired')"> <td><a tal:attributes="href string:${query/klass}?${query/url}" tal:content="query/name">query</a></td> <tal:block tal:condition="python: not query.creator == uid"> <td metal:use-macro="template/macros/include"> </td> </tal:block> <td colspan="2" tal:condition="python: not query.creator == uid" i18n:translate="">[query is retired]</td> <td colspan="3" tal:condition="python: query.creator == uid" i18n:translate="">[query is retired]</td> <td tal:condition="python:query.creator == uid"> <input type="button" value="Restore" i18n:attributes="value" tal:attributes="onClick python:'''restore('%s','%s')'''%(query.id,anti_csrf_this_page)"> </td> <td colspan="1" tal:condition="python:not query.creator == uid" tal:content="query/creator" i18n:translate="">put query owner here</td> </tal:block> </tr> <tr> <tal:block condition="python:path('query/private_for') and (not query.creator == uid)"> <td><a tal:attributes="href string:${query/klass}?${query/url}" tal:content="query/name">query</a></td> <tal:block tal:condition="python: not query.creator == uid"> <td metal:use-macro="template/macros/include"> </td> </tal:block> <td colspan="2" i18n:translate="">[query is private]</td> <td tal:condition="python:query.creator == uid"> <input type="button" value="Restore" i18n:attributes="value" tal:attributes="onClick python:'''restore('%s','%s')'''%(query.id,anti_csrf_this_page)"> </td> <td colspan="1" tal:content="query/creator" i18n:translate="">put query owner here</td> </tal:block> </tr> </tal:block> <tr><td colspan="5"> <input type="hidden" name="@action" value="edit"> <input type="hidden" name="@template" value="edit"> <input name="@csrf" type="hidden" tal:attributes="value anti_csrf_this_page"> <input type="submit" value="Save Selection" i18n:attributes="value"> </td></tr> </table> </form> </td> </tal:block>
