MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 09/08/01 through 09/14/01
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 32,148 1,746,657
MED90 6,098 114,028
MED85 4,366 49,798
MED80 3,701 21,572
MED75 3,502 21,672
MED66 3,497 18,579
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 1,399 42,788
2-4 a.m. 624 15,482
4-6 a.m. 171 14,085
6-8 a.m. 757 34,751
8-10 a.m. 3,829 134,806
10-12 a.m. 9,327 369,992
12-2 p.m. 9,441 327,551
2-4 p.m. 10,631 383,592
4-6 p.m. 9,218 318,222
6-8 p.m. 3,842 154,227
8-10 p.m. 2,422 105,787
10-12 p.m. 1,651 71,023
__________ _____________ _________________
Total: 53,312 1,972,306
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 580
Davis 617
Irvine 285
Los Angeles 649
Riverside 77
San Diego 524
San Francisco 855
Santa Barbara 44
Santa Cruz 6
Lawrence Berkeley 49
Lawrence Livermore 8
Los Alamos 0
MELWEB 0
Searchlight 3,122
Other - UC 45,992
Other-Network UC 504
_____
53,312
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 5,259
Davis 5,785
Irvine 18,020
Los Angeles 5,579
Riverside 618
San Diego 4,189
San Francisco 12,956
Santa Barbara 2,774
Santa Cruz 28
Lawrence Berkeley 449
Lawrence Livermore 270
Los Alamos 0
MELWEB 0
Searchlight 0
Other - UC 1,906,960
Other-Network UC 9,419
_____
1,972,306
1.3 Response time
__________________
Search response time from receipt of search request
DLA until transmission of search response:
Average in seconds 0.8
Standard deviation in seconds 2.8
Present response time from receipt of present request
DLA until transmission of a present response:
Average in seconds 0.2
Standard deviation in seconds 0.5
2.0 MEDLINE AND MEDLINE Databases Detailed Statistics
_________________________________________
Median session length (minutes:seconds) 21:43
Average session length (minutes:seconds) 20:22
Longest session recorded (minutes:seconds) 218:26
Average number of searches completed per session 0.0
Retrievals per search - median 3.0
Retrievals per search - average 385.6
Retrievals per search - standard deviation 5705.0
Percent of searches completed with 0 results 31.9%
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 53,312 11.9%
PRESENT 372,152 83.2%
INIT or CLOSE 21,471 4.8%
OTHER 111 0.0%
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 3,936 5.2% 1,480 37.6% 3 659.8 3604.1
PERSONAL AUTHOR 18,513 24.4% 5,126 27.7% 6 86.5 802.9
TITLE WORD 6,349 8.4% 2,346 36.9% 3 201.9 2871.0
SUBSET 99 0.1% 24 24.2% 39 404.3 1395.8
SUBJECT WORD 202 0.3% 81 40.1% 8 481.2 2787.8
SUBJECT 1,390 1.8% 722 51.9% 17 1013.8 10876.3
EXACT SUBJECT 3,285 4.3% 917 27.9% 23 488.5 5690.8
MAJOR SUBJECT 214 0.3% 107 50.0% 27 444.2 1640.6
EXACT MAJOR SUBJ 429 0.6% 177 41.3% 13 411.2 2150.9
EXACT TITLE 634 0.8% 374 59.0% 1 54.3 217.2
TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 823 1.1% 243 29.5% 368 1912.3 4088.2
MAJOR TREE NUM 0 0.0% 0 0.0% 0 0.0 0.0
CAS 31 0.0% 17 54.8% 443 544.9 531.3
KEYWORD 28,540 37.7% 9,414 33.0% 16 775.9 9010.8
DATE 1,557 2.1% 413 26.5% 6 116.9 669.7
LANGUAGE 3,708 4.9% 995 26.8% 26 295.4 1855.3
UNIQUE ID 127 0.2% 35 27.6% 1 1.1 0.5
ADDED 1,198 1.6% 553 46.2% 5 15.0 29.7
PUB TYPE 1,952 2.6% 444 22.7% 29 185.6 902.1
AUTHOR AFFIL. 419 0.6% 161 38.4% 8 61.0 485.7
CHEMICAL NAME 1 0.0% 1 100% 0 0.0 0.0
EXACT CHEMICAL 0 0.0% 0 0.0% 0 0.0 0.0
AT 1,791 2.4% 526 29.4% 17 501.3 3264.1
AGE 155 0.2% 51 32.9% 24 195.7 398.2
ISN 1 0.0% 1 100% 0 0.0 0.0
ARTICLE 72 0.1% 20 27.8% 61 754.9 1715.9
XXS 107 0.1% 43 40.2% 8 1539.0 11470.4
XMXS 182 0.2% 98 53.8% 9 324.3 1082.6
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 20 0.0% 16 80.0% 358 667.3 901.0
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 15,590 29.2% 5,276 33.8% 6 218.9 3087.1
Single 37,722 70.8% 11,749 31.1% 14 704.7 7925.4
PRESENT commands, by type:
MARC 30.7%
OPAC 28.7%
SMDmm/dd srv.med MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS