MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 05/27/00 through 06/02/00
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 42,958 2,052,007
MED90 9,928 174,041
MED85 7,260 59,454
MED80 6,415 31,938
MED75 5,850 24,514
MED66 5,907 28,602
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 2,625 70,470
2-4 a.m. 749 35,056
4-6 a.m. 485 14,126
6-8 a.m. 1,131 32,074
8-10 a.m. 5,044 164,337
10-12 a.m. 12,725 361,871
12-2 p.m. 13,573 374,686
2-4 p.m. 15,213 446,243
4-6 p.m. 12,497 424,719
6-8 p.m. 6,721 214,552
8-10 p.m. 4,303 138,360
10-12 p.m. 3,252 94,062
__________ _____________ _________________
Total: 78,318 2,370,556
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 371
Davis 679
Irvine 100
Los Angeles 835
Riverside 20
San Diego 1,202
San Francisco 850
Santa Barbara 8
Santa Cruz 37
Lawrence Berkeley 108
Lawrence Livermore 34
Los Alamos 0
MELWEB 65,752
Searchlight 7,237
Other - UC 95
Other-Network UC 990
_____
78,318
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 2,774
Davis 6,710
Irvine 587
Los Angeles 11,237
Riverside 87
San Diego 12,204
San Francisco 8,214
Santa Barbara 85
Santa Cruz 187
Lawrence Berkeley 524
Lawrence Livermore 338
Los Alamos 0
MELWEB 2,279,828
Searchlight 36,823
Other - UC 681
Other-Network UC 10,277
_____
2,370,556
1.3 Response time
__________________
Search response time from receipt of search request
DLA until transmission of search response:
Average in seconds 1.0
Standard deviation in seconds 2.8
Present response time from receipt of present request
DLA until transmission of a present response:
Average in seconds 0.6
Standard deviation in seconds 1.3
2.0 MEDLINE AND MEDLINE Databases Detailed Statistics
_________________________________________
Median session length (minutes:seconds) 20:50
Average session length (minutes:seconds) 17:24
Longest session recorded (minutes:seconds) 229:33
Average number of searches completed per session 0.0
Retrievals per search - median 3.0
Retrievals per search - average 352.1
Retrievals per search - standard deviation 4133.5
Percent of searches completed with 0 results 34.7%
Percent of searches entered that are long 0.0%
Percent of long searches completed
(includes partial results) 100%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
SEARCH 78,318 14.1%
PRESENT 441,248 79.4%
INIT or CLOSE 35,252 6.3%
OTHER 731 0.1%
SEARCHes completed: RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. SEARCHes No. Index Median Avg. Dev.
______ _________ ______ _______ ______ __________ _______
By index:
JOURNAL 4,663 4.3% 1,869 40.1% 4 765.0 3959.6
PERSONAL AUTHOR 21,992 20.3% 6,251 28.4% 7 83.0 814.4
TITLE WORD 7,696 7.1% 3,054 39.7% 3 161.6 1337.6
SUBSET 135 0.1% 36 26.7% 30 291.2 932.8
SUBJECT WORD 410 0.4% 208 50.7% 10 3110.4 16635.6
SUBJECT 2,376 2.2% 1,228 51.7% 20 395.5 2006.1
EXACT SUBJECT 3,748 3.5% 847 22.6% 35 411.6 2802.7
MAJOR SUBJECT 134 0.1% 51 38.1% 15 157.5 452.2
EXACT MAJOR SUBJ 431 0.4% 92 21.3% 22 329.8 2404.2
EXACT TITLE 878 0.8% 491 55.9% 1 8.6 79.3
TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 1,289 1.2% 531 41.2% 307 1502.8 2916.5
MAJOR TREE NUM 0 0.0% 0 0.0% 0 0.0 0.0
CAS 20 0.0% 8 40.0% 12 227.2 544.4
KEYWORD 47,520 43.9% 17,215 36.2% 16 695.9 6271.7
DATE 1,976 1.8% 531 26.9% 7 141.5 1331.3
LANGUAGE 5,289 4.9% 1,348 25.5% 31 381.8 2700.0
UNIQUE ID 272 0.3% 81 29.8% 1 1.1 0.4
ADDED 1,126 1.0% 593 52.7% 5 12.7 18.6
PUB TYPE 2,341 2.2% 585 25.0% 23 149.4 570.4
AUTHOR AFFIL. 621 0.6% 273 44.0% 9 163.1 1698.9
CHEMICAL NAME 11 0.0% 6 54.5% 13 247.4 476.1
EXACT CHEMICAL 0 0.0% 0 0.0% 0 0.0 0.0
AT 4,611 4.3% 1,390 30.1% 21 580.3 5188.2
AGE 209 0.2% 34 16.3% 36 121.1 313.9
ISN 0 0.0% 0 0.0% 0 0.0 0.0
ARTICLE 165 0.2% 49 29.7% 37 478.4 1442.6
XXS 123 0.1% 60 48.8% 11 416.9 2098.2
XMXS 70 0.1% 22 31.4% 8 161.3 619.0
XS 2 0 0.0% 0 0.0% 0 0.0 0.0
MXS 2 0 0.0% 0 0.0% 0 0.0 0.0
Other indexes 25 0.0% 20 80.0% 178 4119.8 8878.7
RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. SEARCHes No. Index Median Avg. Dev.
______ _________ ______ _______ ______ __________ _______
By number of indexes:
Multiple 20,513 26.2% 7,004 34.1% 8 258.0 2795.1
Single 57,805 73.8% 20,141 34.8% 15 639.6 5705.4
PRESENT commands, by type:
MARC 33.9%
OPAC 30.7%
SMDmm/dd srv.med MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS