MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 11/25/00 through 12/01/00
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 48,526 2,643,363
MED90 10,685 190,331
MED85 8,136 87,368
MED80 7,271 31,837
MED75 6,911 20,771
MED66 6,960 28,747
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 2,070 48,132
2-4 a.m. 597 8,240
4-6 a.m. 435 14,226
6-8 a.m. 1,209 35,986
8-10 a.m. 6,225 214,802
10-12 a.m. 14,115 445,269
12-2 p.m. 15,510 499,738
2-4 p.m. 18,475 628,425
4-6 p.m. 13,650 501,390
6-8 p.m. 7,377 269,069
8-10 p.m. 5,333 193,177
10-12 p.m. 3,493 143,963
__________ _____________ _________________
Total: 88,489 3,002,417
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 288
Davis 593
Irvine 53
Los Angeles 1,101
Riverside 56
San Diego 603
San Francisco 1,155
Santa Barbara 6
Santa Cruz 29
Lawrence Berkeley 60
Lawrence Livermore 46
Los Alamos 0
MELWEB 68,487
Searchlight 15,422
Other - UC 157
Other-Network UC 433
_____
88,489
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 4,690
Davis 4,097
Irvine 1,676
Los Angeles 7,600
Riverside 241
San Diego 5,792
San Francisco 18,523
Santa Barbara 202
Santa Cruz 545
Lawrence Berkeley 258
Lawrence Livermore 303
Los Alamos 0
MELWEB 2,951,878
Searchlight 611
Other - UC 1,503
Other-Network UC 4,498
_____
3,002,417
1.3 Response time
__________________
Search response time from receipt of search request
DLA until transmission of search response:
Average in seconds 0.9
Standard deviation in seconds 3.3
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) 20:47
Average session length (minutes:seconds) 17:01
Longest session recorded (minutes:seconds) 249:11
Average number of searches completed per session 0.0
Retrievals per search - median 2.0
Retrievals per search - average 391.4
Retrievals per search - standard deviation 4257.0
Percent of searches completed with 0 results 36.2%
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 88,489 13.7%
PRESENT 516,707 79.8%
INIT or CLOSE 41,505 6.4%
OTHER 604 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 5,134 4.2% 2,129 41.5% 4 1252.9 11990.8
PERSONAL AUTHOR 24,570 20.0% 7,162 29.1% 8 104.5 2660.6
TITLE WORD 9,055 7.4% 3,524 38.9% 3 280.4 3153.7
SUBSET 195 0.2% 63 32.3% 22 1508.5 7294.1
SUBJECT WORD 162 0.1% 91 56.2% 22 1776.1 6581.1
SUBJECT 2,484 2.0% 1,309 52.7% 19 489.4 2370.8
EXACT SUBJECT 4,848 3.9% 1,285 26.5% 32 599.9 4396.5
MAJOR SUBJECT 232 0.2% 132 56.9% 32 253.2 886.4
EXACT MAJOR SUBJ 550 0.4% 126 22.9% 15 228.3 966.7
EXACT TITLE 1,178 1.0% 766 65.0% 1 56.9 294.7
TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 1,129 0.9% 313 27.7% 419 1765.0 4039.1
MAJOR TREE NUM 0 0.0% 0 0.0% 0 0.0 0.0
CAS 21 0.0% 12 57.1% 9 8.4 3.6
KEYWORD 54,177 44.0% 20,757 38.3% 17 768.6 5687.8
DATE 1,666 1.4% 418 25.1% 6 150.8 1239.2
LANGUAGE 6,450 5.2% 1,924 29.8% 27 516.7 3825.2
UNIQUE ID 417 0.3% 173 41.5% 1 1.0 0.0
ADDED 1,152 0.9% 1,131 98.2% 7 26.2 50.7
PUB TYPE 3,130 2.5% 805 25.7% 20 188.8 767.9
AUTHOR AFFIL. 702 0.6% 320 45.6% 8 152.1 870.4
CHEMICAL NAME 8 0.0% 6 75.0% 326 325.5 450.4
EXACT CHEMICAL 0 0.0% 0 0.0% 0 0.0 0.0
AT 5,072 4.1% 1,719 33.9% 27 738.2 5041.7
AGE 309 0.3% 84 27.2% 17 128.5 357.3
ISN 0 0.0% 0 0.0% 0 0.0 0.0
ARTICLE 134 0.1% 48 35.8% 54 603.1 2266.8
XXS 151 0.1% 105 69.5% 23 283.1 799.2
XMXS 74 0.1% 39 52.7% 51 461.5 2094.4
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% 8 11.5 7.0
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 23,119 26.1% 8,619 37.3% 8 350.6 4102.5
Single 65,370 73.9% 23,425 35.8% 16 704.5 5674.3
PRESENT commands, by type:
MARC 28.8%
OPAC 27.8%
SMDmm/dd srv.med MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS